Misfire Diagnostic Fundamentals [98 Toyota Camry]

Single cylinder, constant misfire. Is it spark, fuel or compression? This is all covered in this video and can be applied to every car on the road, regardless of the model year.
ScannerDanner Tools:
www.scannerdanner.com/tools.html
www.amazon.com/shop/scannerda...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

[@supersam1914]

Helped a neighbor the other night with a no start so she can get to work . Great feeling hearing that car turn on and see them happy . Just finished going through your book and I’ll always use it to help with every issue . Awesome book Paul your the man .

[@StrongerThanBigfoot]

Where do I buy his book

[@kidsanjose4707]

What book?

[@supersam1914]

@@kidsanjose4707 ⬆️

[@ScannerDanner]

That's awesome man. Love your neighbor as yourself in action.

[@ScannerDanner]

www.scannerdanner.com

[@TheMopar_Lathe_Man]

I respect the way he says that he should have done something in the first place. Goes to show that his videos are honest and forthright, none of this BS ‘magical’ type of videos that try and make the mechanic look like they are a superstar. Great video Paul, your teaching ability makes it easy for DIYer like myself.

[@ScannerDanner]

Thank you so much

[@StrongerThanBigfoot]

Mechanics should really be the highest paid trade. They keep the world running

[@bryanmortensen8527]

This is a great lesson on the importance of a visual inspection before anything. I know we all have lost our butts before by not doing a good visual.

[@ScannerDanner]

I've gotten spoiled with the newer systems that would have definitely set an injector code 🙂

[@blkthunderbolt]

When you called a '98 old school that made me feel old school.

[@ScannerDanner]

For sure man. Me too!

[@benjaminrich9396]

Love the oldschool basics stuff :)

[@secretsquirrel9722]

Side note for the owner. A set of those connectors can be had for only $15. You don't have to rewire it. Just replace the outer housing 😉. Always a blessing to have a new video Paul!

[@isalmankhan1]

WoW a 98 Camry on my favorite channel, this is a dream come true, I really love this gen of camry😍 Thanks for sharing SD👍🏻👍🏻👍🏻 Special Thanks to our favorite cameraman Caleb😎 Stay Blessed Guy's🙏🏻🙏🏻🙏🏻

[@hondanation9375]

I miss these types of videos good job

[@CarlosDiagnosticos]

Your diags are top notch but few times we talk about the video and audio quality. Awesome in my opinion!

[@ScannerDanner]

thank you! We've been working to improve that since the beginning (2011). Thank you for noticing. My son Caleb Danner is the master at this stuff now

[@jeffmiller6100]

I always wondered about when the injector was not working why it stunk thanks for the excellent answer on that issue this was a great diagnostic video thank you

[@TheFurious74]

I always hear something new from this guy even if topic is simple and obvious

[@dragan3290]

The way you explain everything is awesome! So much detail like I school. ❤

[@ScannerDanner]

Thank you!

[@James-fs4rn]

👍 always appreciate anything you share my friend. Thank you!

[@garyradtke3252]

I am glad to see you teach the tried and true ways of diag that has been around as long as auto repair but I also know that these days more costly and technical test procedures are also required. Starting off with the simple methods is usually the best way. Before fuel injection it was very seldom a single cylinder miss could be attributed to the fuel system but now days it could be either fuel, ign, or compression. I started in the days of ign points and was there for the dreaded switch to electronic ign systems and I have always used a test light for cylinder shorting and to see primary operation. BUT, when I started testing CD (capacitive discharge) ign systems I would blow bulbs immediately. The stator and switch box (module) on a Mercury outboard puts out from 150 to approx 300 V as read on the DVA (direct voltage adapter) to the coil used to test Mercury ign systems. Evinrude calls it a peak reading volt meter but they do the same thing. The CD ign fires on the voltage rise of the coil instead of the fall and I guess more output amperage and voltage but on a conventional ign system weather points or electronic learning to use the test light is the quickest and very accurate way to do preliminary ign system tests.

[@nemanjadzombic6101]

Thank you for another perfect video!!!

[@careyautorepairs]

Thank you for the video Paul.

[@DANNYN224]

Interesting case study

[@richardnilsen5]

2.2L great motor Runs forever Great generation 👃great video👍

[@kirbyschneider4187]

Thank you. Like the process!

[@stuartlade6611]

Hey Paul, been a big fan for about 6 years since discovering your channel! you've guided me as an auto electrician and Light vehicle mechanic! curious as to why you don't do much or any diesel stuff? I would love to see your diesel content 🙏 Cheers Stu.

[@ScannerDanner]

In short, I don't work on them because I never saw them. We have very few diesel engine cars here in the US. However, I have a playlist on my website called "Diesel Engine/Powertrain Diagnostics" I have a friend (Bryan Pollock) who is on the frontlines and is creating content for me. (Current Playlist) - 2015 F-350 Super Duty Forced Idle Mode - 2020 Chevy 6500 Regen Mystery - 2015 VW Jetta 2.0L TDI No Start (Fuel System Testing) - Heui System Diagnostics - 2004 Duramax Low Power [Blowing Black Smoke] - NOX Sensor or DEF Injector Leak? -2015 Mercedes Sprinter DEF System Problems - 2017 Ford F-350 Superduty 6.7 Nox Sensor:module Testing (P020ee) - 2013 F-550 6.7 Powerstroke - Variable Geometry Turbo Diagnosis - Really? 8 Bad Glow Plugs? - 2015 6.7 Powerstroke EGT Blues - 2014 F-450 6.7L Powerstroke, Reductant Heater Circuit Fault Would be awesome to see you there! www.scannerdanner.com/join-scannerdanner-premium.html

[@ThunderbirdRocket]

Perfect video ! Fantastic coaching ! Thanks mate . 👊🏼 🔥

[@billsmith2212]

Great lesson ! Basics first ALWAYS !

[@sheerwillsurvival2064]

Great video old school basics 👊🏻

[@glenntagaylo2339]

Excellent troubleshooting there!

[@gnomiefirst9201]

Great review, Paul. Thank you and best wishes from a 98 Camry owner. Woot!

[@waynetyson3951]

Another awesome video ❤

[@CNSTAdventures]

Zip ties are beasts !!

[@ScannerDanner]

😆

[@valboski28]

Nice Job!!!

[@Pablo_Automotive]

Thanks team Danner 😊

[@lupedelacruz4152]

Thks for sharing Amigo

[@viktorzizic8090]

Cool old school car nice job man 😊😊😊😊 tnx

[@SAMSAM-zr3hs]

Thank you so much

[@McLilWilli]

Danner, do you have any videos on diag of 2017-2108+ vehicles? Been loosely following you for over a decade now. Love the content, and it's depth.

[@ScannerDanner]

Yes sir, but most of the newer ones end up going on my website (SD Premium)

[@McLilWilli]

@@ScannerDanner I bought your e book years ago, with the online access portal. is the SD premium a different subscription/platform/thing/make/model ?

[@ScannerDanner]

​@@McLilWilli yes it contains over 550 videos consisting of all of my classes and exclusive case studies. www.scannerdanner.com/join-scannerdanner-premium.html

[@wyattoneable]

Classic Danner!

[@ericziegler3744]

Fuel trims and rear O2 voltage using the scan tool may have sped up the diagnosis. Great video as always Paul!

[@ScannerDanner]

Agree! Scanner was glitching on me with the new update. Had to update the update lol. Thanks!

[@crasher88]

With the injector being physically unplugged I would expect an obd-2 code for fuel injector circuit of some kind.

[@ScannerDanner]

right? Too old of a system I guess.

[@AkilAmmon-iw2vu]

System is old for that...

[@spelunkerd]

That's a great point about how misfire counters can't be perfect witnesses to which cylinder is misfiring. I loved your explanation of how the computer adds fuel to the entire bank when it finds too much downstream oxygen, not recognizing it is a single lean cylinder problem. I'm guessing it might do that with any cause of a single cylinder misfire where unburned oxygen finds its way downstream?

[@Bwelsh1981]

Paul, I tell people all the time about the random Misfire code ,focusing on the single cylinder misfire. Keep it simple

[@ScannerDanner]

Dude, I just met a former student in Bridgeville at a roller hockey game. Vince? Damn, I forget his name, but he works with you!

[@throttlebottle5906]

zip ties would be my the new injector connector locking mechanism. 🤣 usually too lazy to replace connectors, especially when they work fine electrically. and still seal the elements out. lol

[@Phantomas2011]

Another cool video Paul!!! 😀 Had a NASTY engine vibration on my 1986 E-150 that was so bad it actually broke the left engine mount bolt! After doing all the tests you recommend and not seeing any changes guess what it was?…. Harmonic damper, AMAZING go figure!!! Vibration is gone

[@Santiago_Ordonez_]

Nice. 👌

[@Bseries_Vans]

I had a p0300 fuel trims got worse when i accelerated i could smell the gas out of pipes but had great fuel pressure so i changed plugs and wires bam it runs like a champ

[@mike-yp1uk]

I always look at the injector plugs on misfires and I will use a boroscoped because mice love the vanilla flavored Toyota wires. Lol.

[@ScannerDanner]

Yeah for sure, I let the modern cars I've been working on sway my direction as today's cars would definitely has set an injector control circuit code

[@nathanield.4527]

Can you make some more air conditioning troubleshooting videos?

[@ScannerDanner]

Absolutely! In the mean time I do have an HVAC playlist with a ton of AC videos

[@qusaykambal6903]

Mr Danner i have sent you in your email a video link to a new theory called voltage injection. It is used to examine the sensor signal by using a multimeter. I hope you watch the video and share your opinion about it.

[@ScannerDanner]

I have classes on this called "signal circuit integrity testing" using the ohmmeter and diode scales to create signal voltage on pull-up type circuits. But thanks for the mention.

[@qusaykambal6903]

@@ScannerDanner In fact, I did not know that you had done it before. It seems that I am learning well from you. Thank you and your effort

[@rodvan-zeller6360]

On reading plugs, high performance vehicles like your beautiful power wagon, pinging may happen without you hearing it, as a precaution I like to look for purple spots with a magnifying glass, if present, indication of pinging.

[@martyisabeliever]

Paul... i service a fleet of 40 vehicles most Toyota Siennas, Dodge Promasters, and Caravans and Ford T-350 vans for NEMT... CASE STUDY: 2017 Sienna intermittant no start, all start and chg. Systems check fine, pull in the shop this morning... park it, shut it off, get pulled away to do an estimate and answer some other issues, Emails ect, come back to Sienna... turn key, nothing have an aah ha moment finally condition is reproduced, start down the diag path... find a 3A parasitic.... but cars not asleep yet so kets wait a few min.. as im waiting for it to go to sleep, Transportation mgr. Says sorry i need this one back, can i have it, i say "yeah, hey, i finally got it to fail" he gets in the car turns key, gets nothing..."hey Marty you left it in drive..."😂😅 puts it in park starts right up....condition not recreated and i eat humble pie for breakfast... tunnel vision, object fixation is a real thing...

[@benmayne7910]

Braver than me pulling them leads up I would have gotten a belt off one 😂😂😂

[@johnasosajr]

Hey I have a question I have a verus d10 but I don’t have an amp clamp can I use normal leads to measure amperage for a current draw and what ports do you use? I know 3 and 4 are for resistance or ohms

[@ScannerDanner]

You can, but I don't know what ports you'd use as my Verus Edge does not have an internal ammeter

[@montefiveforty1]

The VSV for the EGR is bad located in back of the engine pass side.

[@dragan3290]

Hi is that just an average test light? Any reply appreciated cheers from Australia subbed and liked 👍

[@ScannerDanner]

Yes sir! An old incandescent style test light will work

[@dragan3290]

@@ScannerDanner thanks heaps for the quick reply 👍👍👍

[@sniperman7590]

My friend, do you have a program or website where I can find out the ignition pin number, including the ignition of my vehicle?

[@ScannerDanner]

Here is a link for the DIY version of the same service info I use. eautorepair.adtrk.biz/?a=10817&c=24&p=r&s1=

[@georgebell3964]

👍

[@mrglowe5452]

I need me some ScannerDanner help! have a challenging issue with my 2008 Audi S5 4.2 (186,000 km) that I hope you can help with. About 1-2 days after washing the engine(12 weeks ago now), I started experiencing misfires in cylinder 2, but only under load, specifically when hitting around 3500+ RPM with about 20-30% throttle. The car runs smoothly without misfires when driven gently without pushing it over 20-30% Here’s what I’ve done so far: Replaced all spark plugs and coils Changed the injector in cylinder 2 Performed an oil service and installed a new battery Replaced the engine mount on the driver's side Conducted a compression test which showed good results Despite these changes, the misfire in cylinder 2 persists. I even tried relocating the plugs and coils, but the problem remains. Any insights or advice you could offer would be greatly appreciated!

[@ScannerDanner]

You've learned a lesson on why I NEVER wash an engine bay. We really need to get a lab scope on the #2 ignition coil and the #2 injector. Water intrusion is suspect for sure. I'm thinking you have a voltage drop, maybe on the ignition supply circuit for the #2 coil and your spark is weak because of it, which could lead to high rpm misfiring. That is a stretch but without some scope readings, I'm just guessing

[@jimforsyth2.]

Those coils on that vehicle are good for being bad and really in moist condition or rain

[@MsFireboy2]

Paul are you still teaching? If so in your opinion how many of your students have enough Basic Electronics to be able to troubleshoot cars at post graduation?

[@ScannerDanner]

I was able to in my first year in the field. Of course I made many bad calls but I had a great foundation that I learned in school. The number is less than 10% though. The same number as good shops and good driveability techs in the industry (unfortunately)

[@MsFireboy2]

@@ScannerDanner I was just wondering. When I was in High School. I went to a Vocational School. I took courses in Electronics, my two instructors were former military. I found there way of teaching very helpful to the whole class. One of them had the love for Digital Electronics. Which I and the majority of the class caught on. So in my College years taking Automotive Service Management. When the instructor was at the stage of teaching electronics it was like a refresher course. So in closing I can see where your numbers are spot on. Thanks for your opinion.

[@SSid-or8rv]

Lean condition? Wouldn't the o2 see a rich condition from unburned fuel going past it? which was prob also what you were smelling in the exhaust?

[@ScannerDanner]

the injector was unplugged, what unburned fuel? But no, even with an ignition misfire, it will drive the O2 lean from the unburned oxygen, doesn't matter if there is unburned fuel too (though an injector not firing and an ignition misfire will look different on your fuel trims but they will still both be positive)

[@buck187uga]

94 mazda b3000 bucks and stalls after warm up only when put into drive or reverse. Runs great in park or neutral. I replaced almost everything with no luck. Finally I unplugged the vehicle speed sensor and that fixed the issue. With a new speed sensor installed the problem returns. Anyone seen this before? It's basically a ranger 3.0. Thanks!

[@ScannerDanner]

Look close at the speed sensor wiring harness. Sounds like it may be rubbing on something, shorting out the 5v ref circuit

[@buck187uga]

Thanks danner I saw that video you had of the dodge truck which helped. I really appreciate your content. Great stuff God bless.

[@KASAD0]

👍👍👍

[@maradallibya5791]

I have Verus Edge and its glitching so much its sw 23.2 Whats the software on yours?

[@ScannerDanner]

I just updated it, so whatever the newest version is. But the day after the update, there was another update and that fixed all my issues lol

[@maradallibya5791]

@@ScannerDannerthank you, So how much does the last update cost you?

[@philmurray1359]

Does anyone still use a vacuum guage anymore to diagnose a petrol vehicle

[@ScannerDanner]

Very rarely

[@jdtractorman7445]

The 2nd software update to your Verus is probably to fix the issues created in the first update. 🤣 You just have to love technology. So, somebody has been attacking the injector connectors on that car.

[@Joserocha-wm9de]

Last time I messed with plug wires with engine running I thought I got shot on my arm ☠️⚡ 😂🤣 Lesson learned ☠️💯😂

[@figol6272]

lol its a sore hit 😁

[@Joserocha-wm9de]

​@@figol6272ikr 🤣

[@ScannerDanner]

😆

[@jordanboulay3780]

as Ivan would say no parts required!

[@KStewart-th4sk]

Braver than i with those plug wires. As a kid many decades ago, my Dad was doing something with the distributor on a Wisconsin V4 engine. It wasn't even running at the time BUT i guess the spark went thru him and out his elbow, it felt like somebody had just punched me in the ribs. I've been a chicken ever since. LOL

[@farmermiyagi1338]

I'm old school, we just put our tongue on them like a 9v battery. ;)

[@sheerwillsurvival2064]

@@farmermiyagi1338lol same thing I was going to say . I used to call Rookie technicians over and grab their hand and Make a nice shock insulator 🤪

[@farmermiyagi1338]

@@sheerwillsurvival2064 Back in my day.......... we used to charge up condensers and toss them to another tech. XD Good times. Good times.....

[@sheerwillsurvival2064]

@@farmermiyagi1338 😂😂

[@ScannerDanner]

I used to do that with my students too 😂

[@aleskyfinis1025]

Like videos

[@claypaul2012]

Why not depin the old connector and repin the new connector? Fuel injectors

[@ScannerDanner]

You could do that

[@kinglangren]

I just put a dab of silicone on the connectors

[@johnz8210]

I don't think the 413 is going to have an injector unplugged when you get it back.

[@ScannerDanner]

Haha right?

[@user-zc6dn9ms2l]

safety lock on injector connector broken

[@ScannerDanner]

Yep

[@GroundedDiagnostics]

😉😉👍👍

[@figol6272]

cant excessive missfires trip a nock code

[@figol6272]

also with the old strats is it possible that the ecm is seing high fuel from the o2s and banging the egr wide open at certain points to reburn the fuel and throwing a code as it cant regulate it like the more modern cars ? could be wrong some 1 with more of a brain on this stuff may have a better explanation ?

[@ScannerDanner]

I would say no

[@ScannerDanner]

That would not be a strategy of an EGR system whatsoever

[@pandrosik]

I’d be scared $hitle$$ pulling those wires while it was running. Nothing like taking a shot from a plug wire to let you know you are alive.

[@ScannerDanner]

😁

[@calzone9033]

Why wouldn't you just backprobe the coils with a pico and look at waveforms? Would've saved alot of time

[@ScannerDanner]

Good question! I didn't have it with me and my Verus would have worked too but it was glitching out on me, so no reason to get on high tech on a constant misfire. I almost never do on these. And honestly this is faster than setting up the scope and getting good secondary ignition captures anyway 😉

[@johnnytacokleinschmidt515]

Lean has higher ionization voltage and shorter burn time. You probably could have seen that and known there was compression pressure and good secondary integrity. You'll wind up in the same place. If you're quick with the scope then you do that. If not and parts are easily accessible I greatly prefer substitution or switching with non-companion cylinders. He could have done all of that in under ten minutes. If he found the problem he would have the fix at hand. Count that against the scope hook-up and verification step that's still required. I like scopes myself. Sun, Snap-on Counselor 1, 2, Edge, Vantage, the computer based one. I'm an electronic hobbyist so my bench scopes have hung out in the shop with me on occasion.

[@throttlebottle5906]

on a car that age with newer looking wires(signs of tinkering), I would have went straight for the spark plugs, without other fiddling, but of course I'd have still done all the other fiddling afterwards to be sure that was all. that plug looked awfully new and shiny, like someone just changed them and stabbed it into dirty-oil putting it down the long valve cover tube.

[@millerfawaz151]

No money fix?? Diag time!!

[@ScannerDanner]

for sure, I meant no parts cost

[@isorozco511]

No money fix? Im sure you charged an hr of your time lol when we work hard to become proficient we need proper compensation

[@ScannerDanner]

For sure! Though I don't charge for what I do anymore as the camera pays us and this was a friend of Pete (garage owner) so it truly was a no money exchanged fix

[@CRAZY_VIDS07]

MMM😅😅SMELLS LIKE STAGED FOR FOOTAGE PURPOSES 😅😅

[@ScannerDanner]

I promise this wasn't staged. It was actually embarrassing that I missed that injector connector before pulling plugs, switching wires and looking for spark leaks on that one plug wire boot

[@throttlebottle5906]

lol, once other issues have been found, it's easy to miss things like that because you stay focused on them. it's a human thing 🤪

[@pantelis241]

Nice one Paul, where your Topdon Phoenix Max scan tool ? Isn't better than the snap on one ?🙄

[@ScannerDanner]

I had it with me. Same day I did that active wheel speed sensor Dodge truck case study (on my website). I just went old school as it was easier 🙂

[@deeznutz3494]

Anything early obd 2, I never trust fault codes when diagnosing a misfire. Way too easy to be mislead, as the misfire counters still weren’t up to snuff back then. Gotta make sure to cover your bases. Good job

[@jimgeorge4677]

I'm not into bonding, and damn sure ain't into mega bonding, but I still love u man! As far as the egr code, I would be quite confident to throw a VVT sol. for the EGR. Best to get at it underneath the vehicle. PITA first 2-3 you do, but cake afterwards. Knock sensor might not be a gimmie. Have had a bad ecu make me a parts changer. Once code popped it went into limp mode. Newer Corolla tho. Same engine platform. You rock. Love your videos. Better tech than I am. kzbin.infozk7Eby4Vzgs

[@ScannerDanner]

😀 thanks brother