Troubleshooting An Intermittent Idle Only Misfire (Dodge Durango) Part 1

[@Diagnosedan]

Gas analyser reading 27.3% Oxygen in the air🤔 Tell Danner to get it calibrated😉

[@billrimmer5596]

Nice to c DD here. Never miss an SD or DD video. DD fixed it again!!

[@EKHondaMotive]

Good eye! Great catch!😁👍 -100

[@ScannerDanner]

🤣 nice

[@thisisyourcaptainspeaking2259]

Air is 21% oxygen, mostly N2 (78%)

[@eugeniujosanu279]

The " computer guys" working toghether, Nice!

[@chrisdavis8299]

I actually learned a lot from watching you perform all the various tests! So not a total waste of time brother! Thank you for everything!

[@grandsea2]

Always good to see that even World Class Tech's like yourself get tripped up scratching their heads by the new part bug sometimes...just proves your human still! Thanks for sharing!

[@Joseph-xx4fd]

Dealt with this exact misfire, exact engine and vehicle. The 3.6 pentastar engines from Chrysler are notorious for roller rocker failures. Just like your coil primary tests it didn’t show in the waveforms I captured. I ended up seeing the excessive “turbulence” at idle in the secondary waveforms caused by improper intake valve seating from a failed rocker, pulled valve covers off and found the rocker took out the cam lobe. On some of your captures you can see the “turbulence” at idle in the secondary burn. Hope this helps appreciate all that you do, I’m a premium member and love the content👍🏼

[@kolton5543]

It's kinda crazy how inconsistent the misfire symptoms from failed rollers are in these 3.6Ls. I had one in a caravan about a month ago. Had a dead miss at idle on #3. Found an intake rocker with just a tiny bit of slop. I thought surely it couldn't be the problem. Replaced it and miss went away. I have a Journey in the shop right now with a small miss on #1 at all times. Intake cam is wiped clean. One valve opens half way and the other doesn't open at all. But only a light miss. Had a Chrysler 200 a while back. Had dead #1 miss at idle and cruising but was fine under load. Again, intake cam lobes were totally wiped clean. Both valves barely opened at all. It seems like every one of them misses differently and the worse the cams are, the better they run.

[@ScannerDanner]

The excessive turbulence you mention is not what we were seeing during the misfire 😉 While I agree, that can happen, but when a spark line completely disappears like we had, this is never from a mechanical or fuel problem. Thank you so much for helping me do what I do. You guys (premium members) are the reason I still produce content here and don't ever ask for donations to the channel. I'm forever grateful.

[@ScannerDanner]

@@kolton5543 i bet in your examples, cranking compression tested good too! But this is where secondary ignition was so valuable here in my case. Also wiped lobes can be caught using an intake and exhaust psi transducer and of course a running compression test, but when the intake covers the cylinder that you need to get to, the psi transducers i mentioned would have been the key!

[@kolton5543]

Yep. Both the chrysler 200 and the caravan had both good cranking and running compression. Nothing noticeable with a mechanical gauge at least. Unfortunately I don't have a pressure transducer for my scope. I'd like to get one sometime. Might make diagnosing valve train issues a little easier on these 3.6Ls

[@CumminsDriver100]

I cannot STAND getting bad new parts. When I first started working on vehicles my brain would automatically convince me that no, it can't still be that because its brand new if the problem remained. Led me on many ghost hunts that I learned the hard way from.

[@tracydiller9378]

Intermittent problems is a pain to begin with but going thru the troble shooting you did led you to the problem.Great video as always.Stay safe everyone.

[@speedy_pit_stop]

I waited days to finally have time to watch this one. Glad I did. It's not as fun when the diag is too easy.

[@thesmartguy3523]

Had a similar case with a Yaris 1KR, misfire was only at idle, at higher RPM, no misfire, no fault codes, all tests passed, turned out to be a damaged intake valve.

[@mypony7310]

I did one 6 months ago. 3.6 chrysler. Ended up being the cylinder head. A cylinder leak down test showed it pretty quick. The new head from chrysler was only like 350 bucks

[@Portuguese-linguica]

Ya the head was only 350.00 but labor and taxes plus other hidden fees more along the lines of 900 to 1,350.01

[@carloshernandez2216]

There is a TSB for this problem in bank 2, they even extended warranty to a 150k miles

[@THERIDESHAREMINUTE]

​@@Portuguese-linguicaexactly. So I just went through this for the 2nd time in less than 3 years with 2 different caravans my 2016 and now 2018. It was easier to use the 1300 bucks for a down payment and buy another one that comes with a 4 year 80k mile warranty. Case closed. Piece of mind for the next 3 years minimum.

[@thogevoll]

Really enjoy your videos. I used to have a 2002 Chrysler T&C that developed a really bad multi-cylinder miss fire. It started as a single cylinder miss fire but after a particularly cold night it became many cylinders (almost all) miss firing. Turned out the wiring harness for the fuel injectors came loose from its support and fell down near the exhaust manifold and melted the insulation on the wires and they shorted together. It was a mess. I had to use a heat gun to separate the wires and then cut out the bad section (about 4 to 5 inches) one wire at a time rejoining them with butt splices and solder with heat shrink over them. After I got done with it the harness still reached to where it needed to plug in and was now too short to get too close to the exhaust. Car ran great after that. Apparently this was a fairly common problem.

[@silvergate8952]

Thank you great description of my problem too

[@bm3772]

Had the exact same issue with a secondary ignition misfire. On the same SUV it Keep sending me down the wrong rabbit hole. Sounding board is good to have. Thank you it was very helpful ASE Certified Chris

[@benclark1113]

Awesome video! Learn so much from you! Had a similar issue with my wife’s 3.6 pentastar a couple years ago, it ended up being 1 failed exhaust rocker arm on misfiring cylinder. Wasn’t making a sound!

[@haakanlight9661]

just got the fuse adapters from AESwave myself. Awesome tool to have.

[@htownblue11]

For an experienced diagnostician, a first instinct is usually a good idea as to where to start, but the goal must always be to let hard factual data / input be the final diagnostic end all. Process of diagnosing is part science, part instinct, and part experimentation. Read the plug and boot and replace accordingly.

[@ScannerDanner]

Unfortunately upper intake removal is necessary to gain access to the coils and plugs, but you are correct and I'm doing everything I can to prove whether or not I need to do that 😉

[@weshawkins7165]

Excellent who done it video. I’ve use my older A/C hydrocarbon sniffer for the same test.

[@THERIDESHAREMINUTE]

Just went through this with a 2018 caravan light misfire when cold but after several hours chugging at certain speeds on highway. After spending 1500 full coil plugs all gaskets. Still check engine light would not stay off. P302 permanent code. I took what it was gonna cost to keep chasing the misfire and went to the dealer and just traded it in. Got an earlier model, less miles and no check engine lights on and a 4 year 80k warranty as my vans warranty expired during the pandemic. These 3.6 engines are really good as long as the problems don't start popping up.

[@mauriceorduna3564]

Just had one of these..same motor same symptoms. Referbisded the heads and found the exhaust valve on cylinder 1 was stuck. Code P0301 Replaced the valves too. That got rid of the misfire. I also thought it was ignition related. Thats what it feels like. Little rumble coming from driver seat.

[@Paul1958R]

Caleb, James, Paul Great analysis and video - thank you! Let us know how it ends. Paul (in MA)

[@shawnhimel1969]

Great video on the total diagnostic process, lots of great testing. great job Danner, great editing too...😁

[@normangallant9879]

Wow what a find.True at times new stuff can be the culprit

[@jonathanbarnes3792]

Was surprised how low statistic for cylinder head was on the repair ranking for the P0302. I was getting tons of compression loss diagnosed for case study results when I had a Grand caravan here with same code, same engine. I was losing sealing of exhaust valves on my customer's 3.6/cylinder 2 as well. Anyway looking forward to the update. Thanks for taking us along on the struggle with this one.

[@faustogonzalez8397]

Thanks Paul , as always AWESOME video !!! keep up the great work !!

[@TradeAlgoPremier]

SD, pls keep us updated on fixes and what the other shop missed plus what type of spark plug used and ignition coil if feasible. Sometimes aftermarket parts don’t play very well engine management system. Thank you sharing this video.

[@wmwil2564]

You got so many tests at your disposal it's all about picking the right one

[@ScannerDanner]

Exactly!!

[@JamesSmith-xs7sr]

Had 2 of those 3.6 with int misfires due to faulty valve seating. Many had recalls for replacement cylinder head. Both vehicles had misfires on the front center cylinder. Last one sounded normal during compression cranking (sans gauge) but ended up with only 60 psi with compression gauge attached.

[@steveguest8028]

Great video this is Paul i have been caught out by this before, had a vauxhall with a dead misfire on cyl.2 put a coil pack on it and the misfire was still there and STILL on number 2 cyl. Would you believe it was a faulty coil pack causing the misfire on the SAME cylinder …. Crazy stuff man

[@luismarty1685]

Hey Paul. You are the man. Keep up the good work Kaleb.

[@nemanjadzombic6101]

Thank you for another perfekt video!!! I know I would struggle with this one. Actually because it's 2 wire COP maybe I would not, but if it's 3 wire and I can't see secondary, that would be a huge struggle. I mean ignition related misfire on idle and not at load... how often do you see that... If it was 3 wire COP, the way to go I think would be to swap that number two coil and plug. But as I said, idle only misfire would put me far awy from even thinking that direction. Greetings from Serbia.

[@fulano787]

Pentastar 3.6 is known to have poorly machined valve seats. Results in cyl 2 misfires. There’s a recall for it. That’s why it’s the first recommendation in the troubleshooting tree. I have one in my wrangler and it had to have the cylinder head replaced under 5k mi

[@robertnicholson8054]

Interested in part 2 also. Saw which I didn't know in petrol injector engine. You have to balance reset all injectors. As timing slightly out. Can only be done on expensive scanner tools not a self DIY 😒. Good luck from Capetown

[@johnjohannemann1220]

Excellent presentation and diagnosis as always 👍🏻

[@eugeniujosanu279]

Had a missfire only at idle or stop lights (park or drive idle) . Was driving me crazy since I know most of the stuff is new , turned out to be one spark plug (all replaced with new ones ) . It got a small crack on it. (No eng light ) New parts going bad in minutes can drive you clueless really fast .

[@timhanialakis8269]

Sounds like it will be back for a rocker arm. Super common I used to replace these rocker arms weekly ( 10 year CJD master technician ). Normally the exhaust rocker arms would make no change in sound when they fail.

[@ScannerDanner]

Someone else mentioned an engine noise too and this engine had zero mechanical noise from memory. I believe the camera mic was picking up the injectors in a few shots as it was attached to me and I was leaving into the engine bay

[@godfamilycountry4211]

Secondary ignition problem? I need to do a little research. Great video guys thx so much

[@Volusiaev]

@ 26:05 Grammy Danner must really be praying for you, Paul, LOL

[@ScannerDanner]

🤣🤣 I'm dying, yes she absolutely would be for that rant

[@eddiereichel9354]

I went through a 6 month nightmare on one of these. It also had cylinder 2 misfire and it had a new coil and spark plug in cylinder 4. I found cylinder 2 low on compression. This was last year around july and I ended up finding low compression on cylinder 2 due to valve sealing issue. Burnt exhaust seat. I get it back together after waiting 3 months on a cylinder head from Mother Mopar. I even took the old head to a machine shop and they could not get the valve seats. So I get it back together and its tapping from the rear of the engine. Its my own fault for not hearing it in the first place but It ended up being roller rocker failed.

[@Steven-mh9gc]

I agree with the techs that are suspecting cyl head. Have had several myself that failed cyl leakage tests. Known problem with 3.6 liter Chrysler penstar engine!!!

[@knock904]

I see u taking the tips Scanner ..u are awesome .gotta keep us sumth 2 click on

[@tcifusion4497]

FREAKING LOVE THOSE CASES....THE ONES U THINK U GOT IT!!DAMMMMM I LOVE THEM......

[@amr-50]

That was a great one danner you are a star

[@joemichael3656]

Found idle miss fires on some ford 3.0 liter 4 valve engines to be burned exhaust valves, usually you can hear it while cranking but got fooled by that because it was so slightly burned and the misfire monitor was picking it up. Also found 4.6 liter engines with head gasket leaks into the cylinder and would miss when cold, took a while to find put the pressure tester on and let sit overnight pulled the plug and found slight amount of coolant on the center of plug.

[@kevinfrye1822]

I seen people say cylinder head and there was a call back / service bulletin on the first 3 years of the production of the pentastar 3.6 l cylinder head causing misfire on the #1 bank but it's usually all 3 cylinders on that bank. They ussually fail a cylinder leak down test .

[@sixstarauto]

Get it all set up, won't break, story of my life.

[@isalmankhan1]

Superb👍 Thanks for sharing SD, Love it👍 The best part is your cool tool's arsenal😎 The outro was awesome, great job Caleb😉 Stay Safe Guy's❤

[@ScannerDanner]

Glad you enjoyed it, just read this comment to Caleb :-)

[@isalmankhan1]

@@ScannerDanner Thanks a lot SD, this is a huge compliment for me😍 You're my mentor, Love your work always, what I've learned from you is unimaginable👍 Stay Safe & Blessed❤

[@JoseAndrade-ke4fz]

This is exactly what i needed! Thanks for the awesome video.

[@kicknsystm]

I couldn't quit looking at that red Camaro. I used to have a 76 same basic color.

[@codysautodiagnosticsprogra8706]

Excellent video like always Paul

[@enriquemartinez7990]

AgainAgain thank you very much I love your videos and it’s awesome when you talk to your brother on the videos it’s a lot of fun thank you very much man God bless you say hello to your brother he’s a cool man👀🌿

[@ScannerDanner]

Glad you like them!

[@jdtractorman7445]

I think try a compression test and leak down test. I saw an engine with a valve sealing issue that had about 125psi and would only occasionally misfire. Had a fubared valve seat in the head.

[@alfee9411]

yep cheap assurance ..had one a year ago that another shop did a used engine and then a coil, injector was bad and smoked the cylinder and i replaced the engine again with all of the goodies. a year later all ok fix it right

[@daveunbranded]

I have the same motor. I reused that intake gasket 2 times. I know it says you can't. But I had no issues

[@lance1097]

We have all been there Paul. Why didn't i do that to begin with. Kicking myself .

[@Pablo_Automotive]

Thanks a lot for this kinds of videos it's really interesting.

[@abonourabonour1006]

Love you ...love you...love you from my heart 💖💖💖💖💖 best teacher in the world

[@ScannerDanner]

Thank you!

[@GeneGainwell]

I'm currently a tech at Dodge and I was scratching my head😅

[@wendywhales2310]

Many years ago bought 4 Brand new Plugs, OK on short runs,,Did a 100 mile run. Firing all over the place,put my old plugs back in,,No more problems..There is a lot of Rubbish parts out there these days..Never Discount a Faulty Part..

[@eduardotejeda]

That fuse box clic never gets old. 🤣🤣🤣

[@alexisjohnson9608]

Hey Scanner Danner awesome Tec videos you can reach a larger audience here on KZbin I miss the Hands-On back in the old class days at Rosedale continue to share the knowledge God bless take care

[@ScannerDanner]

Is this my friend Alex? Former student at RTC??

[@alexisjohnson9608]

@@ScannerDanner yes sir it IS my friend Paul.

[@alexisjohnson9608]

@@ScannerDanner yes it is me my friend. Good to see the videos AND to hear from you.

[@ScannerDanner]

@@alexisjohnson9608 oh man! It is so good to hear from you my brother. I miss you man. It has been a really long time. I hope you are doing well and your spirit is well too. It certainly was not the last time we spoke. May the God of peace be with you every single day. Are you still local?

[@alexisjohnson9608]

@@ScannerDanner hello brotha Paul good to hear back from you. I'm doing well thank you. It has been to long brotha. Searched hi and low for you man and then just decided to leave a comment and pray 🙏 you would read it and reply. You looking huge man and good to see u and ur son working together on different projects. Hopefully one day we can get together so we can catch up even more my brotha. Stay Strong and keep up the good work.

[@okhotrodder]

I've been working on an '19 3.6 for a couple weeks. Swapped parts several times. Dealer said camshaft and rockers. Still have a idle miss that gets worse and worse as it warms up. New lash adjusters, rockers, camshaft, injectors and coils. Still has a miss. Compression is good, all wiring was checked. Just at a loss. When I pulled the cam, left exhaust, it did look bad and I was sure that was the issue till I replaced it and nothing changed. Solus still shows #2 secondary miss fire. Swapped plugs and coils and nothing changed again.

[@ScannerDanner]

you need to do a running compression test. It is common to have good static compression and have poor running compression from a valve issue. And it will also be an idle only type misfire. An in-cylinder pressure transducer on a lab scope would be ideal, but you may be able to catch it with a regular gauge

[@JoeCnNd]

Wonder if he's going to swap to another cylinder. Edit: in the end I guess thats what he'll do. Lol but I love you did the other stuff to keep it informative. The 1 on 5 might be a false read.

[@kylesalem-fuson8012]

I’ve done 4 camshafts in the past year on these. First one took my lunch. Second I was okay. Third and fourth I just pulled the valve cover on bank 2 and there it was. I can swap a cam on bank 2 in about 45 minutes now lol

[@ScannerDanner]

Problem is the intake has to come off, so all this testing was to prove that is what is needed to continue.

[@kylesalem-fuson8012]

@@ScannerDanner understandable. I don’t personally have a lab scope nor the experience to use one as effectively as you do. But I do have a fair bit of experience with those 3.6 pentastars and can have that plenum off in 15-20 minutes lol so I go with what I know

[@billrimmer5596]

Thank u for some great instruction.

[@JAKEaudio2]

Great video as always. Question: What solution are you using in the spray bottle??

[@MarioDallaRiva]

ScannerDanner Premium members need to hear the unedited audio! 😎😈👌🏼

[@ScannerDanner]

lol

[@jorgegonzalez-bk8zn]

Happen to probably all of us before if there if there is a new part that is the last part in question but so many aftermarket parts fail

[@M-HWeldingAndMechanical]

3.6 pentastar from Chrysler had a lot of issues with the cylinder heads. They even extended the warranty on those heads

[@everythingbutkoi6898]

Great work again

[@James-fs4rn]

👍 can't get enough of this channel. Can the secondary ignition waveforms be used to indicate the condition of the spark plugs? Thank you!

[@ScannerDanner]

Thank you! Condition as in wear or an increased air gap? It would be hard to pick that out but it would increase your firing line a bit. But if the plug is open or shorted, yes, you'll absolutely see that in the waveform, but further investigation would be needed because a bad wire or coil can look similar

[@James-fs4rn]

@@ScannerDanner Copy that. I was thinking of a coil on plug setup to judge if it were time to change the plugs. Thanks for the lessons!

[@ScannerDanner]

@@James-fs4rn got it, and yeah, when I see a messed up secondary waveform, there are times that I cannot differentiate whether it is a bad plug or coil, so I move coils and plug around when possible

[@JimmyMakingitwork]

Valve seat issue or carboned up valves… On to the video. :)

[@blakeknox6178]

We’ve done hundreds, of lifters, rocker arms, and cam shafts, for the same problem, especially on the earlier models 20 12, and 13’s

[@ScannerDanner]

Which is why I was shocked when it ended up being a secondary ignition problem. Thanks for confirming that.

[@duanedonaldson2262]

Only guessing, the ECM ASD Output where the fused power in coming from, probably is monitoring if the ASD Relay is closing and the ECM senses the 12V and there are 3 lines to spread out the amperage. NEW, Never Ever Worked. Hi Paul, its Duane from Japan, now in the Philippines, working on coming back to the USA 2024.

[@JimmyMakingitwork]

Wow. You would think they would Know if the problem started after a tune up to look for bad parts? Let us know.

[@bobbybeanz8990]

My guess fuel injector beginning of video. Particularly open

[@blakeknox6178]

Just curious, if it was a bad coil or a plug, my guess it has a bad lifter, or a rocker arm, or cam lobe, I worked for a Chrysler for the past 15 years, thanks always looking for new info

[@ScannerDanner]

I'm pretty sure I proved the fault in the waveform of the secondary.

[@HouseCallAutoRepair]

Love the comments! lol Anxious to see part 2.... Is it cold solder joint on the computer's coil output signal? Shorted coil blowing drivers? Or a defective spark plug with no ground strap?

[@ScannerDanner]

If it was a solder joint in the ecm, we'd have seen that in the primary current ramp test 😉 Same thing with a shorted coil or driver issue.

[@verohandymike]

28:39 Actually the very first thing I've ever done when one cylinder is misfiring is to swap coils and plugs to see if the misfire follows them.

[@gregoryfairchild2460]

Just started the video. Guessing vacuum leak. Air bypassing creates a lean miss usually. Only have high vacuum at idle.

[@gregoryfairchild2460]

Wow...would've been a tough one

[@gregoryfairchild2460]

I'd like to see a close up magnifying glass inspection, maybe ohm the coil etc. Bad boot? Etc

[@logicalguy488]

For the smoker ..... Just so you know, you can use regular baby oil, Johnson & Johnson baby oil makes good smoke. You don't have to use the expensive smoke oil.

[@kas0016]

Yep essentially mineral oil

[@weldingjunkie]

Baby oil stinks so bad it. Mineral oil is way better. Anyone using baby oil def doesn’t use it often makes me sick now

[@tretyakovdenis]

Baby oil smells so bad. I used regular motor oil

[@logicalguy488]

Another factor is ... New is not always good.

[@eddiereichel9354]

To anyone dealing with these engines. The roller rockers failing is caused by the oil galley plugs on front of cylinder head (under the cam phasers). There are 2 plugs that look like bolts right directly undert the cams. Those plugs loosen up and the oil pressure that is supposed to be supplying the head is bleeding off. I pull the plugs out and clean it all up and use red locktite. They could also just be tightened but every single one of these iv messed with those oil galley plugs have been loose.

[@durbinmotorworks6253]

Interesting info. Do you think that much oil would go by the threads? Should be a very tight squeeze.

[@eddiereichel9354]

@@durbinmotorworks6253 Iv done 3 of them so far and every single one of them the plugs were all loose. There are 4 of them

[@kevinfrye1822]

Those 3.6l are known for worn rocker arms causing the valves to not open correctly causing low speed misfired. Long cranking relative compression testing may reveal the mechanical issue of one rocker intermittently binding up.

[@larryreno8293]

But wasn’t this also accompanied by a ticking noise as well?

[@kevinfrye1822]

@@larryreno8293 I've had them not tick and still have a intermittent cylinder miss in early failures of rockers in these specific engines I don't believe that was the case in this video it's been a while since I seen the video

[@larryreno8293]

@@kevinfrye1822 good to know, thank you

[@MrJgonzalez2]

2 minutes into the video, from experience these engines have lifter/head problems. Should be interesting what you find, oh by the way, intake manifold gets in the way of everything.

[@wendywhales2310]

Another problem I had was the engine cutting out at exactly 70mph.???. Turned out it was a Burr, Very,Very Tiny,,Hair type burr on the old type Points,,When Reached exactly 70mph it was advancing to the body and shorting it out.. That was a Real head Scratcher.!!!.

[@billmck12345]

i had a dodge 4.7 engine misfiring on a single cyl after it warmed up.... after a few warm-ups, something dawned on me as to what is going on, so i tryed loosing up the rad cap to releave coolant pressure and misfire went away, put a pressure tester on and pump up to about 5-10 lbs and misfire returned.... it was a head gasket leak!!!

[@joe1273]

The rocker arm needle bearings fail a ton, also had a run of leaking valves.

[@scraiga66]

Kinds of sounds like a rocker tick

[@throttlebottle5906]

@@scraiga66 I caught that also, I'm betting mechanical issue too, which explains why it gets better with run time/heat :)

[@ScannerDanner]

No rocker tick. I believe the camera was picking up the injectors on a few scenes. There was no engine noises whatsoever on this from my memory.

[@abochavez]

Nice camaro

[@justinballard7242]

13:05 good ole 350 vortec leaking around the injector connector. Seen that trick before 😂

[@kirkwest6654]

where is part 2? i work on a fleet of 3.6l dodge engines and the ign. coils are a common issue to intermit. misfire when snapping throttle in gear gets it to miss most of the time and. 9/10 of the misfires are ignition related

[@MR.KNOWITALL1982]

Hi, Teach! Can't Wait for Pt. 2. Are you going to use 3 oscilloscopes? Ohhh... I hope so!!! I like to lie naked next to my Picoscope while rubbing it with baby oil:) I'll share the rest of my thoughts for Pt. 2. You sure outdid yourself this time.

[@ScannerDanner]

🤣🤣🤣

[@dugy40]

sometime when u get a little time can you explain what your listening for when u hold the pedal to the floor and try and start it?

[@ScannerDanner]

Watch the first part of this video kzbin.info/www/bejne/a5qQp5SOiMqooac I go over it in detail

[@stanleystickles7703]

Cylinder head. We changed 12 this year

[@artyfuffkin7805]

A completely cold compression test should be done 1st to rule out mechanical problems

[@florenbaron7111]

What is a secondary misfire? I searched on the browser and I didn't see a definition. Thank you.

[@ScannerDanner]

Search primary ignition and then secondary ignition. Or I have some classes on ignition systems right here

[@alrifainidal]

nice work Mate 👍

[@filmaker256]

Intermittent idle misfire My carmy 98 seems to have that , well only when hot outside. It will go away and stay away after that . I keep hearing IAC valve is the culprit for my car. I do have the intermittent lean bank one occasionally however.

[@ScannerDanner]

Definitely not your IAC with those symptoms.

[@filmaker256]

@@ScannerDanner Hey Danner! I am scared to ask , but if you took your best guess with my car symptoms ... what would it be? I do alot of stop and go driving if that helps? Insert bad news below

[@ScannerDanner]

@@filmaker256 too hard to say over the screen here my friend, but the intermittent lean condition code you are getting along with the misfire symptom could be an injector issue, I'm only saying this because of you car and they are known for injector issues kzbin.info/www/bejne/mGnaqGqigrKjkJo

[@filmaker256]

@@ScannerDanner Thanks for response Scanner. I do have small oil leak on valve cover, not sure why people have said that may cause lean condition but I have heard that. Though I would think most likely dirty injector or electrical problem with injector.

[@cesarjorgemurillobarientos1813]

good

[@fire7765]

Good job

[@kewlskater22mo61]

Just an FYI you will not see misfires when you're in global disable mode. Someone cleared the codes. Thats an fca. There's a drive cycle for it. This stops the report of misfires. And is it really a 2014 by vin? Cylinder head or rocker is the issue.

[@kewlskater22mo61]

This stops the report of misfires.

[@ScannerDanner]

So drive cycle before those PIDs can be used again? Thanks!

[@nunya2814]

Absolute epidemic of horrible parts the past yr. Almost makes me wanna give up sometimes.

[@ScannerDanner]

Man I could have said that myself. Truth in this statement for sure!!!

[@plowe6751]

22:45 Gas analyzers that include HC readings in the range necessary for this test are super expensive. However, gas analyzers that include CO readings in the range necessary for this test are super cheap. Here's what I'm thinking. Take the vehicle outside where there is plenty of ventilation and disconnect the engine coolant temperature sensor to force the engine to run rich. And then do the test with a cheap $97 carbon monoxide tester. Sure beats spending $2000 to $3920 on a 5-gas analyzer that includes HC readings in the suitable range.

[@ScannerDanner]

The HC test is the most accurate, hands down. You can have a complete misfire from a head gasket failure and have no CO or CO2 in the cooling system. Why? You need combustion for those gasses.

[@plowe6751]

@@ScannerDanner The $97 gas analyzer I spoke of also detects hydrogen sulfide in the range of "0-100 ppm, resolution: 1 ppm." I wish somebody would do some research to determine if a hydrogen sulfide analyzer has automotive applications. I often smell rotten eggs in car exhaust. I don't see why it can't be used to diagnose a leaking head gasket. If it turns out that a hydrogen sulfide analyzer DOES have automotive applications, then that discovery is worthy of its own article in trade magazines like MOTOR AGE, and manufacturers of hydrogen sulfide gas analyzers can increase sales by marketing to the automotive industry.

[@ltd4all]

leave the #2 plug, and switch the coil...If the problem moves from #2, then it's the coil...If the problem remains on #2, it's the plug.

[@ScannerDanner]

Love this test, but only one problem, the upper intake needs to be removed to gain access.