2006 Honda Odyssey 3.5 Random Misfire Case Study Part 1 : Diagnosing the P0300, P0301, P0302, Etc.

[@pathable2300]

I have an 06 Honda Ridgeline with 240K miles throwing the same codes. My mechanic has had the vehicle 3 times and hasn't been able to resolve. This video makes all the sense in the world to me and I appreciate the detail in presentation and clarity in communicating the lesson. Most of all, I now have a direction for repair with confidence that the problem will be resolved. Well done Sir and thank you!

[@GoTechTraining]

Hey Pat, sorry to hear your mechanic has been failing you! Glad we could help you with this video. Thanks for watching :) Mike Becker, Senior Technical Instructor

[@axjohn]

Any update on your problem and/or repair? I’ve got same codes (and random misfires) on my 06 Ridgeline with 130k miles. Dealer replaced timing belt, water pump and did the valves. (I replaced all plugs, coils, and pcv valve with OEM parts). Still get random misfires occasionally (cleaned EGR channels but not EGR valve). Help!

[@Jose-xb6st]

@@axjohn have to try with the injectors?. EGR Valve

[@axjohn]

Jose yes I ran a couple of bottles of Redline Fuel Injector Cleaners in two consecutive tanks of gas. I couldn’t get the bolts loose on the EGR valve do I haven’t cleaned it or checked it yet. But I just left my indy Honda Acura repair shop-they loosened them hand tight for me! I’ll remove the valve and clean it after the engine cools down later tonight. I cleaned the EGR holes at the top side of engine and I think I loosened a piece of carbon that has stuck the EGR valve open which I’ve read online can cause a lean signal to the computer due to too much O2 and then computer adds more fuel to compensates, hence my lean code and running rich codes and misfires upon cold startup. That’s my guess. Will update.

[@angelaboyd5026]

​@@GoTechTraining8

[@rjright7373]

My customers issue was a bad coil, replaced, and a month later the new coil went bad which was, fortunately covered, since she knew them and was a great talker. Further, the valve-pan cover gasket was leaking oil into the spark plug area and shorting the plugs out causing the random misfire. Finally, the (braided?)ground-wire from body to the motor was weak (copper was heat-burnt looking, brittle, and easily resolved with replacing and cleaning surfaces. This Honda engine was easy to work on and I appreciate learning new tips from your videos. I have the 720Pro and do back-yard stuff and appreciate learning new techniques to make diagnostics faster to save me work and customers money.

[@GoTechTraining]

Hey, sounds like a lot of things were going wrong on there. Nice job getting to the bottom of all of it! Mike Becker, Senior Instructor

[@arcyc6548]

as a Honda technician myself i couldnt be more happier with the video and illustration of steps, forsure going to subscribe but also add that you couldnt be more on point with the direction, and i gained a few new ways still, thank you

[@GoTechTraining]

Hey Arcy C, thanks for watching! Thanks for the sub! ~Mike

[@coolcat312]

This is quite possibly the best auto repair KZbin video I have ever seen. Can't wait to see the conclusion in part 2!

[@GoTechTraining]

Wow, thank you so much! I really appreciate that :) Mike Becker, Senior Instructor

[@freeworld643]

@@GoTechTraining where can I get to you man u the best

[@ColonelK0rn1]

Me: No way I'm going to watch a 40 minute video about a misfire Me 40 minutes later: Damn, I learned something, I want to see if this actually works in part 2.

[@GoTechTraining]

Hahah Hey ColonelK0rn, Got ya suckered in, huh?! Glad you learned something :) Mike Becker, Senior Instructor

[@nicknicu1787]

Great video Mike! Lots of lessons to be learned here! Very professionally presented,explained and edited! We are dealing with highly skilled and professional people here,make no mistake about it folks! Thanks again for all you do for us!

[@GoTechTraining]

Hey Nick, thanks for all the kind words man! We have the best viewers and audience on KZbin! Mike Becker, Senior Technical Services Instructor

[@charlesbouldin3087]

What a great video! My 2003 Honda Pilot is throwing error codes for cylinders 4,5,6, and the "general misfire" as well. We bought the car with 100,000 miles on it, and the service records show plugs were done, so I was suspecting a stick coil, but now I think it is the valve adjustment. I don't have the diagnostic gear you do, but I was really impressed with your thorough, logical approach. Nice work!

[@GoTechTraining]

Charles, thank you so much for the kind words!!! Hopefully the valve adjustment is all you need :) Mike Becker, Senior Instructor

[@nightrider_1]

Hi Mike. I have 2013 MDX. It has s misfire in cylinder 5. My error code is P0305. 240,000 kms on it So I have done the following 1) Swapped Coil and Plug from cylinder 5 to 6, code remained P0305 2) Tried Seafoam, Redline S1 and Mystery Motor Oil treatment in fuel tank and Engine, issue did not resolve. 3) I got compression test done and it showed low compression in Cylinder 5 120 PSI vs 170 PSI in cylinder 4. Then I got an auto body shop to do all 6 comparative compression test and it came compression is only 25% in cylinder 5 and approximately 75% in cylinder 6. Cylinder 1,4,2 were 100%, cylinder 3 was 92% 4. I took it to Acura and got valve adjustment done, they said it was loose intake valve. It made engine sound alot better and I felt it got power but misfire still shows in p0305. I watched your video and have read forums. Now I am not sure what to try or do next. Any advice and help will be great. What do I try next?

[@GoTechTraining]

I replied to your other comment Saad! Mike Becker, Senior Instructor

[@MX-CO]

Vcmuzzler 2

[@aliciarobin7637]

I want to thank you so much for making this video. I'm in the same boat with my 2005 EX-L, which ironically is identical to the one in your video. After 2 Honda dealerships and an independent shop gave me the run around, I had almost given up hope that a proper diagnostics could be done. Going back to said "lazy" dealership #1 armed with my new knowledge and pray that it hasn't been going on long enough that it's burnt a valve. Oh well, if it has, they'll be fixing that, too....thank goodness for extended warranties! Now I'm going to watch the rest of this series!

[@GoTechTraining]

Thanks Alicia! I hope you have better luck the second time around. Always better to go at it armed with information. Good luck! Mike Becker, Senior Technical Services Instructor

[@bgsound2721]

Much better explanation here, than I got at dealership. Thanks

[@GoTechTraining]

Awesome BG Sound, thanks for watching! Mike Becker, Senior Technical Instructor

[@One-way]

HUGE THANK YOU for this AWESOME video !!! I was able to FIX my 190,000 mile Ridgeline that “couldn’t be fixed”…. YOU sir are a SUPERSTAR !!!

[@GoTechTraining]

Hey Drue, Thanks for the kind words! Glad you got your truck fixed!

[@FragItAll]

Glad i found this, I'll look for the rest and follow. This is most likely one of the problems I'm having right now with my '04 3.5 Pilot. My thoughr on your question was the time would shorten.

[@MatthewDurant-eh1ov]

Any update?

[@FragItAll]

​@@MatthewDurant-eh1ov Turns out I also had a bad front seal which I feel helped blow a cylinder. (I cheaped out on oil till I was able to fix problem, never got to it.) I am in the slow process of changing engine, I have to many projects going on.

[@johnaclark1]

Fantastic video, Mike. One of the best explanations and analysis of the waveform I've seen. Hope you enjoy doing those back exhaust valves...Always gives me a sore chest by the time I'm done with one of these.

[@GoTechTraining]

Thanks JohnAClark1. Yeh, my chest was sore after. Love laying on the motor! Mike Becker, Technical Services Instructor

[@rosieclark3661]

My 2010 3.5 V6 coupe rear exhaust valves are chattering like a baby’s rattle I jut got to get my lazy ass out there and do them on a good day off work 😳😳😳

[@billneu9520]

Thank you so much for Video. At 74 yrs old still learning I have a idea on Valve clearance. Thanks again.

[@GoTechTraining]

Hey Bill, age means nothing! Never stop learning, right?! Mike Becker, Technical Services Instructor

[@DANNYN224]

I have an 2000 Honda Odyssey with codes p1399 P0300 p0301 through 6 i cleaned the egr that didn't work did a valve adjustment that didn't work I replaced the coils and all spark plugs and it was fixed and threw up the same codes again what you think I can do the customer is telling me it is dumping fuel burning alot of it can fuel injectors be part of p1399 codes thanks

[@jptrainor]

The exhaust valves on my 2010 Odyssey EX-L (vcm engine) were all a little loose except cylinder 5 which was slightly tight. Every intake was a little loose. That was the first valve adjustment for the vehicle and was done at 146k miles.

[@reboticant]

Fantastic video and great explanations. Anyone fixing cars needs to understand the underlying fundamentals. New subscriber(also master/L1) grateful for some refreshers. As the diagnostician at my shop, I break the scope out on occasion, but this ticket also shines a light on some of the problems with boots on the ground and flatrate. At this point with a Honda + miss on front bank, I'd just sell the adjust. If I was wrong my shop would (yes, really!) eat the labor. If you eat 2 out 100 you still come out way ahead. For the FNGs out there, further general confirmation can be had by holding a paper to the tailpipe on a Honda and feeling for a pulse. With this particular car it likely wouldn't be absolutely conclusive given the specs, but this issue is seen across all Hondas with adjustable valves and a sure tell on the 4 cylinders. Re: Cam gears not installed on shafts correctly. This has become more common as more manufacturers use press fit cam gears instead of pins. If you get one of these in, step one is to have the owner asked if the car worked on recently. On something like a Mazda 3 installing the crank pin tool and pulling the valve cover to install the cam bar is generally going to be faster than breaking out the scope and navigating the schematic to find your pin hook ups. You are absolutely right about spark plug choice. Gotta see NGK or Denso. Can't count the number of cars I've fixed by pulling out a brand new set of +4s or splitfires and installing the OEM plug. Great video, thanks.

[@GoTechTraining]

Hey A B, glad to have you on board!!! Welcome to the channel! All valid tests man, I can tell you've lived the life for a while :) I despise these press on gears. I had a 3.5 EB F-150 that the cam reluctor shifted on the cam...stupid issues that shouldn't really happen but they do. It's amazing how good some of these companies are at marketing their "special designs." There is a reason why NGK has the most OE market share and those "others" have little to none! Again, thanks for watching! Looking forward to more great comments from you. Mike Becker, Senior Technical Instructor

[@dearboy05]

You are an good, honest mechanic. Unlike the slobs my friends take their cars to. They will charge for everything, whether it fixes the issue or not.

[@NewLevelAuto]

Leave guesses in the appropriate questions below 😁

[@haywardsautomotive6156]

Hmmm and if it was would it affect the vacuum reading? Hmmm would it affect just random cylinders? Hmmm would the vacuum be steady, erratic, high, low with a P0302, P0304, P0305 or possibly be unaffected? If unaffected which way would you lean...valve adjustment or solenoid with these waveforms and DTCs...hmmm? Would your fuel trims be affected...hmmm? If you're talking about a solenoid for the exhaust I think someone stole it :D Hmmm VCM J35A7

[@haywardsautomotive6156]

If you're talking about the exhaust :D

[@psav1520]

Valve duration will change because it is contacting the "ramp" of the cam later and released off of the "ramp" of the cam earlier. Valve open duration will be less (shorter) after increasing valve lash.

[@GoTechTraining]

Hey P Sav, great theory. I think you may be onto something. :) Going to have to wait until tonight to find out! Mike Becker, Senior Technical Services Instructor

[@jamesbsa6450]

@@GoTechTraining Awesome explanation and diagnosis. Love your teaching methods. Would agree with P Sav,- the valve should ride the cam shorter duration when properly adjusted compared to one with too little of gap. Is this what you found in testing as well? Thanks!

[@123demaio]

My 2009 0dyssey misfired and idol was rough ...The air intake hose had a big crack and Misfired bad ...i put tape around crack immediately ran better no longer mis fires..I ordered a new intake hose attached to the air cleaner and intake

[@GoTechTraining]

Hey Robert, Yeah those un-metered air leaks can cause your engine to run terrible! Nice diagnosis and repair! ~Ryan

[@OzMechanics]

Awesome video. When I took my hands on scope class we were supposed to use the pressure transducer but we ran out of time. Call that you made a video about it. Keep up the good work mike

[@GoTechTraining]

Thanks Oz! They are super interesting to play with. I still have plenty to learn! Mike Becker, Senior Technical Services Instructor

[@JohnSpruce-u2h]

So is the exhaust valve actually leaking on the vacuum stroke. Not seating properly...in olden days a intermittent popping would be detected at the exhaust pipe and holding a piece of paper in front of the pipe and watch the paper get sucked back toward the pipe when that cylinder came to fire....

[@MaicSalazarDiagnostics]

I can wait to see you doing a class for the in cylinder pressure transducers, vacuum and exhaust sensors waveform test!

[@GoTechTraining]

One class at a time! Patience my friend!!! :) Mike Becker, Senior Technical Services Instructor

[@VesselFitterguy]

Can my 08 Odyssey being out of valve adjustment cause it to smoke..could it be a burnt valve or could it just smoke cause it's out of adjustment??? I just bought it and did the timing belt yesterday. I hear atleast one lifter Clacking over like it's loose. Il probably do the adjustments this weekend.

[@GoTechTraining]

Hey Usay, these engines are super common for oil burning issues cause by bad piston rings :( Mike Becker, Senior Instructor

[@oluwatobiakinwande8606]

Nice one Mike, I'm presently experiencing the same issue but yet to conclude it's the valves. Because mine starts working well then suddenly changes mode by flashing lights and disables three plugs hence vibrating.

[@GoTechTraining]

Hey, thanks for watching! If the check engine light is flashing, you have a damaging misfire occouring. You're losing 3 cylinders at a time? Mike Becker, Senior Instructor

[@MX-CO]

Look into VCmuzzler 2

[@atnorman]

First-time viewer. Super impressed with Mike's knowledge and presentation (I'm a professor, if he were my student, he'd be getting an A). My '06 Odyssey with 220k just threw these exact codes and has the exact same slight roughness at idle. Mike's diagnosis is the bomb. And, he showed me that the proper diagnosis is something that I don't have the time or tools to do. If I go in and have someone like Mike come to me with this kind of information, I'd be totally confident to make the decision as to whether or not to put money into this old van (oh, mine also needs struts, axles, and a couple of other things). Cheers.

[@SpaceDarren]

I may need help tomorrow with the printers in the villages though.

[@SpaceDarren]

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[@SpaceDarren]

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[@SpaceDarren]

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[@SpaceDarren]

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[@bekomcar554]

Hello Mike, truly brain awakening tutorial from theory, diagnosis and the solution as well. Oh, indeed professional presentation as well.

[@GoTechTraining]

Ahh I love when we can stimulate a brain! Thanks for watching Mike Becker, Senior Instructor

[@dankelly5582]

Minor correction. The valve doesn't move further into the engine at 27:30. Instead is moves further past the valve seat.

[@GoTechTraining]

Hey Dan, you're right. The valve is not at risk of hitting the piston. I did not make that clear. Thanks!!! Mike Becker, Senior Technical Instructor

[@scottstanger7919]

I have a 2007 Honda Polit with a P0302 code and came across your video as I was looking to see how to proceed on my Honda. In short I was so very impressed by your presentation and knowledge, so much so that I watched all 3 parts. A valve adjustment is way over my head and the tools I have to diagnose or fix, but you did provide me with the knowledge to go to my mechanic and know what to ask about if a valve adjustment is required. Can't say enough - GREAT video. Thanks

[@smottiebug7518]

lol, its not like rebuilding a transmission. The tools needed… $3 feeler gauge from auto parts store $5 allen wrench set $10 socket set from harbor freight. And A small amount of brain power to remember how an intake manifold and valve covers go back on. Its not hard to do,, but it does take a while and is kinda tedious to adjust 24valves. (usually, only the 12 exaust valves). But its pretty easy to do and check them yourself for peace of mind. (without all that fancy waveform devices.) especially if you know they are due, because you haven't had them checked in like “ never” or “forever” +100k miles ago.

[@scientist100]

I like this but it is harder to pinpoint the valve lash clearance unless you had a good known waveform. I will try the intake manifold pressure reading with a vacuum transducer and see what happens.

[@GoTechTraining]

Hey Scientist100, thanks for watching. You're right, it is near impossible without known good. It is fun to play with and experiment though, right? Mike Becker, Senior Instructor

[@scientist100]

@@GoTechTraining Yes, I've read that intake manifold pressure changes are better for monitoring the valve lash issue, I may have to get the more sensitive sensors that have absolute pressure from other KZbinrs here. I got the Fluke PV500 but I did not see any signal for vacuum pressure changes, just a flat line, I will keep playing with the settings but I do not see it lol. I like your videos, very well explained and professional.

[@EASYRIDERTOO]

a compression test should show the condition of the valve, piston and rings 150 and up eliminates all possible problem.

[@DANNYN224]

I adjusted the valves perfect and still have the codes p1399 and cleaned the egr valve pulled the egr out of the vehicle dont know what to do

[@GoTechTraining]

Hey Danny, P1399 is a pending misfire code. How is the ignition system? Plugs within maintenance spec? Mike Becker, Senior Technical Instructor

[@DANNYN224]

@@GoTechTraining I think I need new coils but didn't check the spark plugs

[@TheDjibounga]

Very nice detailed video, I however did not understand how you decided it was not a valve adjustment problem after checking the intake valve numbers on the vacuum gauge and the engine pressure using the introducer but after running the full graph came back to decide it was a valve adjustment problem after all. I have an 06 odyssey and the garage is trying to charge me $1200 for the adjustments even though they say they are not certain it is the problem. They say the plugs are ok and the coils seem fine too. The vehicle has about 180k and triggered all 6 misfire codes on all banks. Why would it run rough with check engine light on one day and smooth with no check engine light the next.Any advice? Thank you.

[@MX-CO]

Look into VCmuzzler 2

[@DanielGonzalez-rx5nn]

Did you resolve your issue Im having the same codes on my 07 honda pilot

[@Vuratzkee]

Dude, you are a genius. Your on details. Point every point. Great job. Your video helps a lot. And that gadget you use is awesome. I might get one.

[@GoTechTraining]

Thanks Wilbert, really appreciate it! Mike Becker, Senior Technical Instructor

[@crystal1484]

Great video 👍 would you able to explain how you added power point onto the picoscope. Would be greatly appreciated.

[@GoTechTraining]

Hey Sherwin, thanks for watching! I took a screenshot of the PICO capture using a program called "GreenShot". I then copied it into PowerPoint so I could do my hand drawn overlays. It works really good that way. Mike Becker, Senior Technical Instructor

[@crystal1484]

@@GoTechTraining thank you very much. Keep the up the good work

[@baxrok2.]

Great lesson Mike! My '05 Oddy was trouble free with 180kmi on it. Never adjusted valves. Amazing engines, valve adjustment necessity aside! On to part 2.

[@GoTechTraining]

Hey, thanks for watching dude! Enjoy the series :) Mike Becker, Senior Technical Instructor

[@eastbay40386]

My colleague's 2005 Honda Pilot got a P0301. And that's the only code, how possible it's from the loose vales of the cylinder. Or it's only caused by the bad coil, spark plug, fuel injector? The car has 190k miles on it. I think the spark plugs never got replaced. Thanks.

[@GoTechTraining]

Sounds like its going to need some diagnosis. Figure out if it's getting spark and fuel first before pulling the valve cover to inspect valve clearance. Chances are it's going to need more than one thing at that mileage. Mike Becker, Senior Technical Instructor

[@RacerJames76]

I understand the valve being opened sooner, but i dont see how that would cause the valve to open further... Wear causing the valve to move up into the seat/rocker/cam would not have any effect on length of travel in the other direction would it?

[@cwj9202]

It is the combination of valve face wear and valve seat wear which causes the valve stem to be closer to the valve actuating mechanism, in this case the rocker arm; therefore, the rocker arm contacts the valve stem sooner causing the valve to open sooner (as you already mentioned), and simultaneously the rocker arm pushes the valve stem further down, because the rocker arm mechanical travel is set, and the limitation of valve travel is controlled by the gap between the rocker arm and the top of the valve stem. You can verify this on a complete head assembly by adjusting one gap to zero and actuating that rocker arm to a specified amount of travel and comparing that measurement to, say, a gap of .012". Hope that helps.

[@RacerJames76]

I get the earlier and longer duration...i simply do not understand how missing or worn metal can cause the valve to extend further down into the cylinder...

[@bernhardlist9359]

James Musselwhite The valve is not going further into the cylinder but if the seat is hammered in and now the valve lift is the combination of the (missing) gap plus the lobe hight, so the distance between the seat and the valve increases which results in a bigger opening.

[@RacerJames76]

kzbin.info/www/bejne/r3mqeaafntmBpLM Shows the valve extending further INTO the cylinder...

[@bernhardlist9359]

James Musselwhite No that is incorrect. The maximum is limited by camlift .... more is not possible.

[@Jose-xb6st]

I have the same issue in a Honda Pilot 2004 that has the same engine 3.5. Codes PO300,302,303, and 305. I will start with the cheapest part like Spark plugs, coils and PVC valve. Last time in the highway start chaking and the VTM4 Light cam on too with all those codes. I already change the EGR Valve and Fuel Pump. Is this SUV have problems with valve adjustments?.

[@GoTechTraining]

Hey Jose, yeh, same engine same issues. What happens if all of the "cheapest parts" don't fix it? They add up, right? Maybe you should have this thing professionally diagnosed? Might save some money in the long run! Mike Becker, Senior Technical Instructor

[@joeclark8029]

hi mike great video!! question 1... can you get intake vacuum reading by taking the baro number and subtracting the map number to get intake vacuum reading? question 2 why is the map reading not actual vacuum and what is it measuring because it says map vacuum? question 3 what do you do if it has variable valve timing and need to take incylinder transducer reading but dont want variable of valve timing, isnt that a concern? im sure alot of people are wondering this or they havent thought about it so could you please help us out with these questions. much appreciation

[@GoTechTraining]

Hey Joe, thanks! For the minute that it takes to hook up my trust gauge to the intake manifold I prefer to grab a really quick manual reading rather than trusting the sensor. For VVT you can unplug the solenoid to verify the VVT isn't being phased, but you have to hope/assume the phaser is ok and not partially mechanically stuck. Mike Becker, Senior Technical Services Instructor

[@jakeandrus690]

I have had stall complaints too with the 3.5's, those usually have high cylinder leakage

[@GoTechTraining]

Hey Jake, good to know. Maybe the next one I get will be even worse! Mike Becker, Senior Technical Services Instructor

[@arthurfricchione8119]

Three excellent videos and excellent presentation. Very well put together especially if you own a Honda with a 3.5 like I do. Best presentation I've seen. Thank you

[@GoTechTraining]

Hey Arthur, thanks!!! Glad you liked it! Mike Becker, Senior Technical Services Instructor

[@NickWhite630]

Great video Mike. Is it okay to rely on the Map (8.8) - Baro (28.3) readings in the freeze frame to save the time of getting out the vacuum guage?

[@GoTechTraining]

Nicholas, many people do. I like the vacuum gauge. It took less than 2 minutes. I like to look for that rock steady needle. I'm sure others may say different....but the little bit of time to prove out something as concrete as a vacuum gauge on the intake...seems worth it to me. Sensors can lie, my trusty vacuum gauge can't....usually :) Mike Becker, Senior Technical Services Instructor

[@richardhamer7911]

That guy is a great teacher..thanks bro.!

[@Newberntrains]

This is great education I don't work on cars for a living but love using KZbin to learn about stuff I think that pico is worth 10x it's weight in gold for how portable it is and what it can do

[@GoTechTraining]

Hey Sandy, thanks for watching! The PICO is soooooo valuable. A truly great tool! Mike Becker, Senior Technical Services Instructor

[@yusuihang]

Excellent video. The only thing that I would have liked to see was for you to have commented on the noise of the valves when the engine was running. Since the service recommendation was to do a valve adjustment if the valves were noisy, I would have liked to see you do that check. And then comment on whether you actually thought the valves were noisy. And if the valves were not noticeably noisy, wouldn't that have led you away from doing a compression waveform test using a pressure transducer?

[@GoTechTraining]

Hey, the valves on here were not noisy. These valves tighten up, noise usually comes from loose valves. Mike Becker, Senior Technical Instructor

[@smottiebug7518]

yeah i think someone should edit the service recommendation on that one to say “ if the valves are not noisey check the valves”. Someone should tell whoever wrote that service recommendation. This is not a 1964 VW Beetle engine. (clack, clack, clack. clack, and its still running?)lol

[@ashuye4]

Excellent video Mike. where are you located?i wish you are in Houston Texas. Because a week ago my 2006 Honda odyssey when i started the car the upper intake manifold explode. which is very odd for me. i never heard too. what would cause you think to explode . what do you think caused it ?if you could replay it i will appreciate.

[@GoTechTraining]

Hey Mike, great name! :) I'm in Fond Du Lac, WI. That's odd. Something caused it to backfire maybe? How was it running before then? I have a friend down in Houston. Look up OZ Mechanics. Mike Becker, Senior Technical Instructor

[@ashuye4]

@@GoTechTraining Thank you and i will look for OZ Mechanic

[@smottiebug7518]

good vid. lots of great info. Except the part about “the valve travels further”. Technically, It wouldn’t travel further* from your explanation. For it to do that. There’s only a few ways I can think of, that could cause that to happen. “the valve rod increased in length or the the cam lobe got bigger” Or “valve adjustment screw was tightening itself down further over time” or “the the valve spring has gotten weaker bouncing the valve down further past its normal travel” since the first two would have to break the laws of physics to increase in size or length… Actually,. at 200k the valve may not completely close until pressure is inside the cylinder + I’m sure they have gotten shorter or worn down from original size,)along with the valve adjustment screw). Also, if the spring was that weak it wold definitely have major issues with valve lash especially at higher rpms.(And it will really ruin your day if the valve hits the piston). But,..from your explanation. What you can say,… {{“Because exhaust ports are hotter the metal becomes softer. The valve seat is beaten down further into the head. Reducing the rocker arm clearance until it is pressed against the adjustment screw.” “Which makes a lower valve seat opening that will cause the valve open sooner and close later.” (Meaning, the valve will stay open longer….Not Further*) “And If the valves are not adjusted. Eventually the valves will not completely close causing them to become burnt”.}} And..Thats all my 2 cents. Enjoy!

[@smottiebug7518]

oh, also FYI. a bad headgaaket can also mimic those readings.

[@bfwsk2157]

Same engine with the P0300 but bank 2 fuel trim is going down to negative 17 at idle. Should I be looking at leaky fuel injector or is there another main culprit. Thanks.

[@GoTechTraining]

Hey B Fwsk, that -17 fuel trim is pulling fuel away for some reason. Could be a leaky injector for sure...could also be other stuff. You could throw a fuel pressure gauge on there and see if the pressure bleeds off with the key off. Mike Becker, Senior Instructor

[@philsmobilewelding]

I got the same codes on my Honda Od and customer has never done any Tuneups at this point at 220k . Says he’s never had any trouble with shaking or engines lights until now? Is this still a valve adjustment protocol? Thanks love you video , your a gifted teacher 🙏👏never stop teaching 👍

[@GoTechTraining]

Hey Phil, honestly, i'd probably start with all of the tune-up stuff. Spark plugs, valve adjustment, etc. Mike Becker, Senior Instructor

[@everardocamacho5063]

Veru good videos mike, one question to do the valve adjustment?the engine has to be rotate clockwise or counterclockwise? And how do you which way must be rotate it, thank you mike, and cheers from ontario California.

[@GoTechTraining]

Hey Everardo, thanks! Most engines rotate clockwise, but that is not ALWAYS the case. One way to know for sure is to use the starter to slowly spin it over to verify which direction is normal. You may also find information on the direction of rotation in your service information. Mike Becker, Senior Technical Instructor

[@mikestriegl6363]

I'm working on 07 Pilot with same issue. It has wore me out trying to fix it nice info.

[@greggb1416]

210K miles...? Just getting broke in... I know, I know, I am woefully late to viewing your video, but my local Honda shop is telling me my 2004 Acura 3.5RL, with 214K (absolutely no issues till now, no leaks, no burn oil, religious oil changes at 3000K)... Great car...!

[@GoTechTraining]

Hey Gregg, thanks for watching! Man, I do love that 3.5L engine. Mike Becker, Senior Instructor

[@gross43]

H Great Video. How does the PCM determine that the engine is misfiring from the exhaust valves not closing completely?

[@83vf1100c]

Absolutely one of the best diagnostic videos on KZbin I’ve ever seen. My 2006 Odyssey has nearly 300k miles and is exhibiting similar problems as well as significantly worsened fuel consumption (15-16 mpg driving cautiously). Going to attempt the valve adjustment myself while also doing the timing belt service soon. Just out of curiosity, what scan tool are you using? Keep the videos coming!

[@GoTechTraining]

Hey Mike, thanks!!!! Good luck doing your maintenance yourself. Should save you a ton of money over going into a shop. I used the Snap On Verus in this video. Thanks for watching! Mike Becker, Senior Technical Instructor

[@ggg17ggg17]

Can this valve issue cause oil consumption ? I have a 2010 Honda Accord v6 a/t and it burns oil, about 1 quart every 1000 miles and has a p0420 catalytic code. That’s about it, i alredy took my engine apart and can’t find no major issue, I’m going to replace piston rings but i don’t know if that’s the problem

[@GoTechTraining]

Hey Ernesto, no, I don't think the valves being tight would cause an oil burning issue. Those engines have a big issue with the piston rings gaps all lining up and causing oil burning. Sounds like you need new rings. Mike Becker Senior Instructor

[@mikem1014]

nice video... had customer with 2007 Honda FIT .... stall issue ....when cold.... back out of drive way after one stall... you start back up an never did it again till next cold start . valve adjust fixed it but did kick my ass for couple hours diag time ....

[@GoTechTraining]

Wow the valves were bad enough to cause the stall! Mike Becker, Technical Services Instructor

[@gary00832]

What brought me here is you guessed it, a 2006 Honda Odyssey 3.5. Had the same issue but grabbing at straws because the previous owner did absolutely zero maintenance!! How would one check wave forms with all this technology? Any alternatives? Thx partner!!

[@shadetreeracer3715]

If the plastic cover was on it you would know for sure 😂

[@mrreymundo5383]

Just finished tearing my 04 down and adjusting the valves. Had miss codes on 3 and 5 and random misfire code. New plugs all around. Still missing mildly when at idle. Also, huge flat spot on first acceleration after warmup then restart. I assume they are unrelated. I put a new TPS in while I was in there, but flat spot is not better, and maybe worse now. Anybody have any ideas? Google is a wasteland when it comes to Odyssey hesitation on acceleration, at least for my year.

[@GoTechTraining]

You maybe have an ignition coil or 2 failing? You could try swapping them to different cylinders and see if it follows. Mike Becker, Senior Technical Instructor

[@mrreymundo5383]

@@GoTechTraining good idea. I was wondering if there is a good way to test those coils without owning an expensive diagnostic computer. Those coils cost about $52 apiece.

[@GoTechTraining]

There really isn't. Load testing a coil is the best test for it. That's why I suggested swapping to another cylinder. If the issue follows, then you know its a coil. Mike Becker, Senior Technical Instructor

[@SG-go9zc]

Awesome lesson. Thanks. Question: why would the speed of the exhaust pressure/vacuum release cause the engine to run rough? It doesn't seem to effect the intake, compression and firing events.

[@GoTechTraining]

Hey S G. It's not the "speed" that we are seeing. It's the time. If the exhaust valve opens early it's cutting the compression stroke short. Engines are super fine tuned as to when the valves open and close. Any discrepancy in that can and will cause divisibility issues. Mike Becker, Senior Technical Instructor

[@joeKisonue]

It's like your toes hitting too early when you are running.

[@marck16v]

Interesting but where is part 3 Did it fix it o not ? Valve lash adjustments

[@GoTechTraining]

Here's a link to part 3. Yes, the van was fixed! kzbin.info/www/bejne/q6S7g4SoZdmVj7M Mike Becker, Senior Technical Instructor

[@sakitlikod1]

Mike, would you recommend to change timing belt,water pump,pulleys,tensioner on my 2004 odyssey with only 68k miles? As you know it's 13 yrs old van. Any advice/input is greatly appreciated,thanks

[@GoTechTraining]

Hey Sakitlikod1, hard to say. There really isn't a "years" spec. It's always been done in mileage. That being said, we all know what rubber looks like after years, dry, cracked, etc....It would DEFINITELY be worth pulling a cover and inspecting. At the end of the day, maintenance is maintenance and a timing belt, h20 pump and tensioner is way cheaper than an engine :)

[@RogerPaul-planetx-nibiru]

Brother I'm having a awful time trying to figure this out. I hooked up a obd2 reader because our truck "only vehicle" isn't running very well. I received codes po300 all the way thru po306 "all cylinders" misfire. Last month i replaced all six plugs and all six ignition coils. I also codes po404 po420 and po430 Some codes was on there twice even. The truck ran great before and now it'll run but we are afraid to drive it. My father inlaw thinks it's a clogged catalytic converter. The truck is a 2008 Honda Ridgeline, with oil changes and maintenance on time. What do you think? Any help is greatly appreciated, God bless... Me, I'm not a mechanic i just figure out what's wrong then i fix it. I'm lost on this.

[@NewLevelAuto]

VVt oil control solenoid stuck?

[@haywardsautomotive6156]

On the exhaust...hmmm VCM Intake?

[@ousmanesarr7287]

I believe this engine have only vtec and cylinder deactivation.

[@dcope3420]

I have a 2011 pilot i yhink is doing the same thing. I origionally thought it was simply the vcm operating soeraticky to put it in eco mode but now I'm thinking I might need to make this adjustment. Wondering if the engines are similar or if you could comment on whether using vc muzzles is a good practice to control the eco mode on a second gen 3.5 vcm engine?

[@marlonbrown5612]

I have a 2004 Honda odyssey 3.5 and I have the same issues where are u located and what's the cost for a diagnostic like this

[@GoTechTraining]

Hey Marlon, we are located in Fond Du Lac, Wi. Generally, this should be able to be diagnosed in an hour's time. So most shops should charge you their standard 1-hour diagnostic fee. Mike Becker, Senior Technical Instructor

[@marlonbrown5612]

This guy is real .it's hard to find real mechanic but running across u ur real and know what ur doing

[@GoTechTraining]

Thanks Marlon, good luck finding a good shop in your area! Mike Becker, Senior Technical Instructor

[@tunerfreak2087]

Would a tight valve adjustment be a constant issue or could it/ would it be an intermittent issue?

[@GoTechTraining]

Hey Anton, depends on how tight they are. Also depends on driving conditions. Maybe they are only slightly tight and are only affected when the engine is really? The check engine light may or may not come on all the time...but generally speaking a tight valves a tight valve. No changing that. Mike Becker, Senior Technical Instructor

[@tunerfreak2087]

The issue im having on my 06 mdx is an intermittent check engine light for a misfire but its never felt on an engine thats warming up from cold. Alot of times its cylinder 1 & 6 and had cyls 5 & 3 once or twice, already went thru the ignition system with plugs and coils and changed out all 6 injectors so at this point im thinking it could be a valve adjustment issue or egr ports dirty. Any input on what you think?

[@DylanRabier]

Just finished watching part 1. Superb explanation Mike. I really appreciate all the effort you put into these videos!! 👍👍

[@GoTechTraining]

Hey Dylan, thanks! Appreciate you watching and commenting :) Mike Becker, Senior Technical Services Instructor

[@brandonl562]

Now that is how real professional's diagnose a misfire! My 08 Accord 2.4 is misfiring too. Changed plugs, coils,pvc valve and mas sensor. Bogging down while driving cant go above 20mph. Needs a compression test. 186k miles. High oil consumption stealership wants new piston heads and rings. 3k. I bet it's the valves.

[@GoTechTraining]

Hey Brandon, thanks for watching! Make sure to take a look at the catalytic converter. Engine bogging down can definitely be caused by a plugged cat. Mike Becker, Senior Instructor

[@brandonl562]

@@GoTechTraining Thank you very much. Also in Hondas the exhaust valves tighten up. They've had this problem for years. I was thinking it needs a valve adjustment. Inside the muffler there is alot of carbon built up

[@brandonl562]

@@GoTechTraining Would a bad cat throw a code if it was bad?

[@AkAmiri-t5j]

Hi how you know which one is first cylinder to sixth cylinder. I have 2007 honda odyssey I want to know how it goes from first cylinder to sixth cylinder

[@ezye4567]

Hi men , I have a question, I cleaned my throttle body and map sensor on 2009 mdx then my check engine light came on and the rpm got crazy so I relearned the tps and did the idle procedure but still the problem is not solved. When I press the brake pedal to stop the car so the rpm bounce at the end and also when I release the gas pedal the rpm jump with out pressing the gaspedal and also some times the rpm just drops still my foot is on the gas pedal. Any advice please and thank 🙏

[@chriskeller7723]

My guess is map sensor let me know if you figured it out.

[@mikeburton1733]

WOW! This is freakin' awesome Mike!!! When I started watching your video, I have a WELLS t-shirt show up, then my new PICO shows up. WOOHOO!!! But now after watching your video all the way through I realize, now I'll have to get a pressure transducer and I haven't even taken the PICO out of the box yet. Hard to keep up with you big dogs. LOL. This is a great video Mike. Really looking forward to part 2.

[@GoTechTraining]

Hahah the tool list just keeps growing and growing doesn't it!?!?!??! Any luck with those auctions!? Mike Becker, Senior Technical Services Instructor

[@mikeburton1733]

No. If I had no tools whatsoever, I would have done well on that one. Since I have a lot of tools already, It wasn't worth it to me for the monies they were going for. All the scantools had 2010 coverage. Mine is 2017. And some items didn't work so. But always looking.

[@GoTechTraining]

Ouch 2010 coverage is no good. Cost to update is almost as much as some new tools. Always looking is right, I am too! It's harder for you in Canada I suppose. There are a ton of Facebook groups selling used tools and equipment here in the states...you have similar groups in Canada? Mike Becker, Senior Technical Services Instructor

[@mikeburton1733]

None that I'm aware of near me. Just Kijiji. and craigslist.

[@jc9364]

you are a amazing teacher. much respect.

[@GoTechTraining]

Thanks Gerardo! Mike Becker, Senior Technical Instructor

[@richscruggs2858]

eric o has a video on this also, his video shows vaccume like yours, showing that is caused by leaking valve, if valves were not leaking should it go to zero?

[@GoTechTraining]

Eric has a video on everything. haha! I believe any time the exhaust valve is open it should equalize the cylinder to whatever the exhaust pressure is. Mike Becker, Senior Technical Services Instructor

[@poq600]

Hi Mike. 07 ridgeline owner. So help me visualize. My brain is fogging up. Does this mean a tight valve will close later, slower and lesser thereby causing more heat to burn valves?

[@movingupautodiagnostics8645]

Thank you so much for this presentation. Now I have a better idea on how to interpret in cylinder pressure.

[@GoTechTraining]

Hey Emmanuel , thanks man! Glad you liked it! Mike Becker, Senior Technical Services Instructor

[@gilbertomoran7420]

I'm blown away man, so much usefull information on this video . Defenetly subscribing to your channel .

[@GoTechTraining]

Hey Gilberto, thanks for watching! Welcome to the channel! Mike Becker, Senior Instructor

[@jimbojohn6345]

@@GoTechTraining we qq

[@robertleifeld225]

why not a cylinder leak down test:1. hook up air 2 go listen to the tail pipe 3. Hear air leaking, Sell valve adjustment

[@GoTechTraining]

Robert, in some cases i'm sure that could work. Not sure if it would have on this one. Would have been an interesting test. I'm not sure of the result. Maybe they weren't hanging open far enough to leak? Hard to say. Good input though! Mike Becker, Senior Technical Services Instructor

[@MrBuddysAdventures]

I was thinking the same thing i.e. how would I've done this say 20yrs ago without pressure transducers and Picos lol but at the same time I really liked the video as this is the way to do these things today. I enjoy using the labscope even though it takes me longer to setup and interpret results but that's because I don't use it often enough.

[@reboticant]

You likely wouldn't be able to hear it, because it isn't quite tight enough to hang at TDC. The lobe is ramping it too quickly. I agree, though, that given the circumstances it could have been sold.

[@anthonyfili11]

i am curious if this test is valid on a turbo engine as it has more than 100% volumetric efficiency is shouldn't go into a vacuum at the both of the stroke with both valves closed, right? Im sure you can still compare when the valve opens in correlation to the stroke of the piston just i figure the waveform would look quite different. I might be out to lunch on this but I'm curious.

[@GoTechTraining]

Hey Anthony, this test was done at idle, so really it shouldn't look much different because there's no boost. Under boost you would expect something totally different! Mike Becker, Senior Technical Services Instructor

[@JOHNPHUFNAGEL]

Mike if i could I would give you 10 thumbs ups! This is one of my weak points in engine diagnostics, and this is by far the best explanation of ICPT I have ever watched!! Thanks so much

[@GoTechTraining]

Hey John, thanks!!! I appreciate the kind words! Mike Becker, Senior Technical Services Instructor

[@Belladelogo]

My honda odyssey 2000 has the same problem. I took it to honda dealer but they couldn't do any thing. Do you know what problem ? So i can tell the tech when i drop my van to the shop.

[@rochediy9057]

Would this reflect in a compression test as well? Im getting good compression (about 175psi after 5 cranks in each cylinder) but have persistent misfire codes and very negative fuel trims.. especially in Bank 2.

[@raeesmuhammad2168]

Very good and technical videos you make for us thanks

[@GoTechTraining]

Thank you very much! Mike Becker, Senior Technical Instructor

[@NewLevelAuto]

Valves too tight?

[@haywardsautomotive6156]

Yes

[@aztecahernandez6539]

So. Did you fix it by just adjusting the valves.

[@GoTechTraining]

Hey Azteca, It was all fixed up with the valve adjustment! Mike Becker, Senior Instructor

[@prashanshan7125]

If valves are the problem why vacuum gauge was steady...?🤔

[@slfox804]

This video answered so many questions thank you!!!!

[@danishzd]

wouldn't you be able to get some idea with a relative compression test? some cylinders will have lower compression than the others? enough to cause a misfire may be

[@flowerpt]

You're an excellent educator, Mike. Thanks.

[@GoTechTraining]

Hey Bill, thanks soooo much! Mike Becker, Senior Instructor

[@wyattoneable]

That was a great visual of the piston placement vs degrees of rotation. The whole project was well explained Mike, thanks.

[@GoTechTraining]

Hey Wyatt, thanks man! Sometimes a visual is the best way to explain a complex theory. I hope it all came across in a sensible manner like it did in my head...haha! Mike Becker, Senior Technical Services Instructor

[@upkarbath]

Please do a video on modern car blower motor controller.

[@GoTechTraining]

Hey Upkar, I can make that happen! Mike Becker, Senior Technical Services Instructor

[@stuzman52]

Great job Mike and look forward to the conclusion! 😀👍

[@GoTechTraining]

Thanks Terry. Stay tuned! :) Mike Becker, Senior Technical Services Instructor

[@overboostn]

Could the transducer also see a leaky intake valve?

[@GoTechTraining]

Sure, I'd want to look for a pressure spike in the intake vacuum. Throw the transducer in the intake and I'd bet you'd see it. Mike Becker, Senior Technical Instructor

[@juanhernandez1238215]

Hi there very good video, I have a question I have a Honda Odyssey 07 model 3.5 engine, and just recently I replaced the valve cover gasket and when I got done doing so I turned the engine on and now has a misfire in all cylinders running very rough and the idle stays really high up to 2000 rpm and can’t figure out what could possibly caused this to happen by just changing the valve cover gaskets I have checked all the vacuum hoses are connected where they supposed to be and all the electrical connectors are plugged too I can’t see anything that I possibly had left out or not connected. But this vehicle has bout 250,000 miles in it , and probably never had the valves re adjusted , Am wonders if that’s what the problem is , or any suggestions, that someone can help me with any advice, please and thank you

[@GoTechTraining]

Hi Juan, thanks for watching! I don't see how a proper valve cover gasket replacement could cause issues like that. Now, if something got messed up or something went wrong, then I could see that... Mike Becker, Senior Technical Instructor

[@juanhernandez1238215]

Wells Vehicle Electronics thanks for taking the time to answer my question, but I find the problem, some how by moving stuff around trying to get the rear valve cover back on where it goes one of the fuel injectors connectors came unplugged sitting there looking like it was plugged but it wasn’t so that was given me all cylinders misfire , it’s crazy how one little thing can mess lots stuff but yet thanks

[@robertcook4399]

Awesome video! Would this condition contribute to other issues that are frequently called out as the 'fix' for this problem? For instance, a gunked up EGR valve?

[@GoTechTraining]

Hey Robert, no I don't see a way the 2 could be related. I think these are 2 individual problems, but i'd recommend taking care of both at the time of tear-down! Mike Becker, Senior Technical Instructor

[@anuar.m.y]

my friend's pilot has all P0300 thur P0306 codes come up and when we tried to load the car up on ramps, the engine had no power to go up the ramps, i am thinking low compression but we will see, also the check engine starts to flash and according to forums thats unburnt fuel in the exhaust.. not good at all.. but he is a stubborn little shit and he want s to keep doing things to the engine.. i personally dont think the compression is going to come back good, but we will see over the weekend.

[@GoTechTraining]

That's no good! A flashing check engine light is damaging the catalytic converter. Hope you can get it all fixed up! Mike Becker, Senior Instructor

[@anuar.m.y]

@@GoTechTraining i actually bought a cheap compression test kit and to be perfectly honest i think one or 2 pistons may be down in compression, i mean the car would not go up the ramps, but if you feel charitable enough you can feel free to come help me trouble shoot the issues.. LOL

[@GoTechTraining]

If you were near Fond du Lac WI, I'd be happy to take a look :) Mike Becker, Senior Instructor

[@anuar.m.y]

@@GoTechTraining ill keep you posted of my findings, hopefully i can figure the codes out

[@anuar.m.y]

@@GoTechTraining so i did the compression test on the engine, the back cylinders were fine, but the front ones were lacking... D=dry/W=wet Cyl1 D = 150 / W = 155 Cyl2 D = 110 / W = 131 Cyl3 D = 150 / W = 153 Cyl4 D = 112 / W = 132 Cyl5 D = 148 / W = 155 Cyl6 D = 125 / W = 134 so according to the info online, the comp supposed to be 130 and above, but still have all 6 misfires, my mechanic thinks it is the timing chain, since the vehicle is at 270K miles and chances are they never serviced the chain properly, PLUS he bough the vehicle form an auction..

[@markhb3346]

Can you please share your Pico file ?? I have a 3.5L same issue and want to compare my capture against yours .

[@noneyall2819]

What about a faulty. Not broken. But faulty cam shaft sensor. 04 honda accord?

[@dougaustin973]

I am not a mechanic, but it sure seems like he knows his shit! He IS a very good teacher! That much I can tell.

[@GoTechTraining]

Thanks for watching Doug! Mike Becker, Senior Instructor

[@lottie170]

nice video how much does cost for a check at dealer

[@GoTechTraining]

Hey Larry, hard to say! You're best bet would be to give them a call and ask. Mike Becker, Senior Technical Instructor