Misfire Quick Tests (Is it a spark, fuel or compression problem?)

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2007 Dodge Caravan/Chrysler Town and Country 3.8L with a misfire. In this video I will walk you through some simple tests to help you isolate the cause. Even if you do not have a lab scope, the cranking sound test I show, will help you determine if you have a compression problem or not.
Tests shown:
- how to perform a cylinder drop (RPM drop) test using a test light
- how to perform a cranking compression sound test
- how to perform a relative compression test with a scope
- how to determine which cylinder has low compression on a starter current waveform (how to sync a relative compression test waveform)
Tools used
- OTC 3633 Mini Circuit Tester
www.jbtoolsales.com/otc-3633-...
- PicoScope 4425 4 Channel Standard Diagnostic Kit
www.aeswave.com/cart.php?m=af...
Related videos
- Cranking compression sound and scope test
• Cranking compression s...
- How to perform a compression test with a scope (Picoscope)
• How to perform a compr...
- How to perform a compression test with a scope (Verus-Vantage)
• How to perform a compr...
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.

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8 июн 2024

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Комментарии : 776

@joemikos900 6 лет назад

I've had the paid channel for almost 2 years. Even having experience I find the channel exceptional for training. Let's say, top 3 best on You Tube IMHO. It has something for everyone for sure.

@willgeorgiadis6472 5 лет назад

Joe Mikos how much is it?

@ehabshady7984 5 лет назад

Hi I'm not a technician but I am interested to learn these electrical engineering.if I resisted in played channel,did you think I'll learn.

@ScannerDanner 5 лет назад

It's $11 a month and I offer a 14 day free trial. Thanks for your interest!

@EartAlienEB1 4 года назад

I need a guy like you to help me find my problem , got a bad first /cold start issue with a 1.6 8v SR 102 hp vw engine . Starts right up but then idles poorly in 3 cylinders and then drops rpm and dies . after driving it for 5 minutes when car gets warmer it starts right up no issues any more . it has got power and pulls ok but sometimes around 2000rpm it shakes a bit . Help?

@ryana.miller8260 3 года назад

If Scannerdanner is among the top three here on RU-vid, I'd be curious to learn about the other two channels behind him! Lol

@FCES_Electrical_Sol 2 года назад

I love advanced diagnostics , this guy is a diagnostics master in automotive.

@arneerisoty2700 2 года назад

He gets to the root issues quickly, teaches his tricks all without editing, he's the real deal!

@tmo2798 2 года назад

Straight to the points. All of them. Acknowledged mistake in assumption and explained it all clearly. Thanks, Dan!

@dtnel 6 лет назад

I like watching you do things hands on which puts things in perspective for those of us who lack experience with troubleshooting in certain areas. +1

@auginater4200 4 года назад

Or those of us that lack these fancy tools lol

@robinsonsmotorcycleandauto3929 6 лет назад

Happy to see that Pico scope out. Great Job Paul it's always a pleasure to watch you work.

@Airman.. 6 лет назад

Good job sharpening production skills Paul.. your channel is just getting better

@W.Khairi 5 лет назад

Can't get much more professional than that, Thank you very much.

@davidweum9334 4 года назад

Valve spring?

@dporrasxtremeLS3 6 лет назад

When you present on video I feel like you are talking directly to me very effectively. Thank you for All your videos S/D!

@billk5727 6 лет назад

Thanks Paul, The real time out in the field diagnostics like this drive the learning from the Premium Channel home. Take care Bill

@ScannerDanner 6 лет назад

Thank you Bill!

@dawinner777 3 года назад

Excellent video. Although I don’t understand the scope diagnosis completely it certainly opened my eyes to deeper diagnostic techniques.

@markorkarenhanes1354 11 месяцев назад

Gonna sub, not only for the great info, but I see you are still replying to comments today on a 5 year old video. Very rare and commendable. Much respect. Thanks.

@ScannerDanner 11 месяцев назад

Wow thank you! If that's not motivation to keep answering questions, I don't know what is.

@waitforit6524 2 года назад

Scanner "no sugar coating" Dan, well done again. Nicely explained.

@secondwindmusicproductions 6 лет назад

I had a 94 Chrysler Laser years ago with intermittent low compression on one cylinder similar to this case. It turned out to be a bad valve guide. Using a compression gauge it would read bad one time and OK the next. It also fouled the plug with the bad valve. It was bad from new. The dealer knurled the guides and it worked for 6 months or so, long enough to get out of warranty. I ended up replacing the cylinder head after which it ran far better than when new. Oil in the cylinder made it want to pre-ignite. The knock sensor backed off the timing and it was a stone. After the fix I could lay rubber with it.

@Sloppyjalopy123 6 лет назад

Always gain something from your channel, thanks for sharing your knowledge. If you ever get the opportunity, I'd love to see your take on ECU tuning. Especially for a forced induction engine.

@monstersquashracing 5 лет назад

You have a unique ability. Thankyou so much for all the help

@johnrunck849 2 года назад

You’re a beast. Definitely completely thorough.

@whitdough8150 2 года назад

They got me really like looking for sounds now 😁... It's very amazing what a vehicle can say just by that sense.

@YmhTeezy256 2 года назад

The best I’ve ever seen do it so far

@Inkd_watkins 6 лет назад

Quick, efficient and effective. Time to move on. Great vid Paul.

@throttlebottle5906 6 лет назад

it's a dodge caravan, it was beat when it left the dealer lot :))

@LAU3768 5 лет назад

Thank you for sharing your skills and video,you are the best diagnosis master.

@padraiggalvin2807 5 лет назад

Great video man. Thanks for sharing your knowledge. I wish if i could use my pico as good as you as im currently trying to find an intermittent missfire on an almost new engine

@josefelix4152 4 года назад

I see why it's pointless to further check for anything else than physically checking the valve train, thanks I learned a lot today.

@charlesgould8436 2 года назад

I had to learn something before I could learn from your content. Thank you and Schrodinger!

@mikerama4724 6 месяцев назад

My daughters 2002 mazda626 has a cylinder 3 misfire, changed the spark plug, coil and wires with no change with rough idle I’m at my wits end. Your video has given me other possibilities to explore. Thank you for your video.

@505fastlife6 2 месяца назад

Take to someone who knows how to properly diagnose instead of throwing parts at it. You will save money in the end.

@djlord9189 5 лет назад

Lifter problem wouldn’t be intermittent like that though. Intermittent sticking valve is my guess. Caused by binding valve guide, or weak valve spring.

@terryzak1742 6 месяцев назад

Absolutely brilliant! Great job. Very impressive.

@danielisasume 5 лет назад

learned alot about the picoscope great vid very informative

@marcaineasunder 6 лет назад

I have that same problem on my 3.6l pentastar!i think you just solved my problem!i will keep you updated.Subscribed!

@arthurfricchione6614 6 лет назад

Thanks a lot Paul for the quick response and great explanation. Appreciate Artie

@johnszoke586 4 года назад

Very comprehensive video, thanks for the information

@baxrok2. 6 лет назад

Super! Never a sync done on a waste spark system. Thanks!

@ScannerDanner 6 лет назад

Thank you for watching!

@RobertL78 6 лет назад

I just changed the heads on the 2000 Ranger 3.0 with 188,000 miles. They had known exhaust valve issues over time. Turns out I had cylinders 4 and 6 getting coolant in the chamber which was cracking spark plugs and then once I had the old heads on the bench, 5 out of 6 had brake parts cleaner leak past the exhaust valve seats. Now with new heads with hardened seats, all new head, intake and valve cover gaskets, I am battling high LTFT's. Got new O2 sensors on the way since mine have about 60,000 miles on them with raw fuel from misfires for who knows how long. Good news is that there is no sludge in the motor and the cylinder walls still have the cross hatch on them.

@jeffhesse8415 6 лет назад

Nice job. Trying to catch that with a compression gauge isn't easy. I've been trying to get the guys I work with to do relative compression test because it is so quick and easy to do.

@billsmith2212 4 года назад

Auto Ditex has a unit that can do relative compression from the battery . Unsynched takes about a 10 second crank . Or you can connect an extra cable and synch the pattern . It's about $ 300.00 . Diagnose Dan has used it . No lab scope needed . They also have a lab scope and other test equipment .

@daviddealba9886 16 дней назад

I have the same problem cylinder 4 .sometimes it runs good sometimes it runs bad.but always cyl 4 .the car had a ticking noise after the head gaskets were replaced .so I replaced both rocker arms and lifters .i don’t know that it had a code p0304 before I replaced the rockers because like I said it had a blown head gasket .the machine shop said the heads and valves were ok .when they resurfaced the heads .so now I’m stuck with the cyl 4 misfire .compression test showed bad compression .bit some times it runs great .you nailed it for me .its a bad lifter ona new rocker assembly but more than likely a piece of some thing is blocking the oiling orifice for that lifter. Thanks a million your thorough diagnosis lead me to the only problem it could be .bad lifter or more likely a piece of silicone blocking the lifter orifice intermittently.now I can fix the car for zero dollars .

@jorbitz69 4 года назад

Hey Paul, thank you for an another excellent learning video showing your technique of performing an on the spot diagnosis of an engine misfire through the process of elimination. While others may overlook, I also appreciate you taking the time to discuss the economics of maintaining an obviously beat up vehicle with a high mileage on its rap sheet vs looking at other viable options. This is huge. You just don't run a vehicle and expect it to work for you without giving the needed TLC. Wear and tear caught up with it and just feel sorry for the owner who probably was thinking that you could reverse it. Albeit, well done, my man.

@baddriversofnorthtexas6850 6 лет назад

Send it to Eric, he loves those vans

@SmittySmithsonite 6 лет назад

HAHAHA! He sure gets alot of those!

@SouthMainAuto 6 лет назад

Make my living on Chrysler's haha

@niterbum 4 года назад

not what i wanted to hear i just bought one haha i love your channel to SMAR

@niterbum 4 года назад

too

@robertclymer6948 2 года назад

Really great info! Could a valve hanging or sticking cause that low spike on # 3? Thanks for sharing. Learned good info today. Cheers from Motown.

@zbynekm2918 3 года назад

Great video Paul, I'll be definitely watching more, I believe I'm hooked.

@ScannerDanner 3 года назад

Thank you!

@patrickchamberlain5102 6 лет назад

Like my Verus Pro...graphing shows you so much

@niks983 4 года назад

Stumbled on the channel today and it's awesome. Wife's 2008 caravan 3.3 has a intermittent cylinder 1 misfire. I did plugs and coil and it ran good for a day now the light is back on. I'm guessing I'm dealing with a lifter problem. Thing has 109000 and is a decent ride. When you first start it she idles a little rough but smooths out after a bit.

@KollynJ Год назад

Is that what it was my car is doing the same plugs and coils don’t last

@robinsonsauto 6 лет назад

Nice troubleshoot Paul!! As always~ That's a tough call on this one. But face 😂

@habatroll4831 6 лет назад

Paul I recently purchased a Pico 4425 kit. It is awesome by the way. I enjoy your videos and I am learning quite a bit from them. Quick question, I noticed the spark event was after TDC, do you recall if there was a timing issue? I was just wondering because I am not sure if I was looking at it properly. Thanks for all of your hard work.

@ScannerDanner 6 лет назад

timing slightly ATDC is common during cranking

@stevehall9585 6 лет назад

I had a few of these Vans and I had good luck got over two hundred thousand miles on both of them.

@timothycooney986 3 года назад

Paul, please consider a video outlining requisite diagnostic instruments for HOME mechanic, including affordable scan tools. Thx

@jimbola77 6 лет назад

EXCELLENT SCANNER DANNER THANK YOU FOR SHARING PARTNER!!!!!

@douglasmontgomery6315 5 лет назад

Good job sir and well explained

@devoncoolman88 6 лет назад

Awsome video as always!

@marvinlee3450 Год назад

Thx for all the people you help. I have a 1990 e150 that has a hard miss with occasional shuddering. I have replaced all ignition components, same problem. Do you think it could be a bad ecm with leaking capacitors.?

@darrylrossetti6496 6 лет назад

Always start at square one even if it had new parts and never assume the new parts are good. Found a bad brand new spark plug more than once.

@robertbell525 5 лет назад

Wife's van with the 3.3 is at 235K and still running great. A little rusty around the edges.

@MonzaRacer 6 лет назад

Frommy experience it possibly has a cracked spring, common in my area. They break and allow a random recurring misfire on single cylinder. IF repaired repalce all vs seals and springs. BUT car is beat, the estimated price of top end pull apart ie vc/intake/etc tell them to take repair costs and old car and trade on different car AFTER having car given an extended vehicle inspection with test drive.

@dwainkowalske7800 Год назад

I had almost the same problem on a 2000 dodge G/C the only difference was the misfire was sporadic but we couldn't recreate the misfire over several months and 2 trips into the shop. 3rd time being the charm my customer brought it in when it was actually misfiring. For the misfire to surface they had to be on there way home from work with lots of stop and go traffic and the temperature was above 85 degrees and still intermittent. After checking spark and fuel that were good, it had low compression on cylinder 3 with a leak down test proving it to be a bad exhaust valve. After removing the heads we could see the issue which was a hairline crack in cylinder 3 exhaust valve. After watching this I started to think what the vacuum gauge would show while doing a cylinder balance test. Next time I get a misfire like this I'm going to have to look at this just to see if there's anything of value in it. Thank you for the great videos you always have great content.

@holbrook8794 4 года назад

Dude this save me wasting money on ignition coils and fuel injectors on my z3... thank you so much. I do engine work in the Pittsburg, Ca bay area.

@ScannerDanner 4 года назад

I am in Pittsburgh, PA :-)

@timothyball3144 6 лет назад

Rear valve cover isn't that bad on that van. I did stem seals on one at 485,000 miles. Last I heard it was still running just fine North of 500,000. Commercial van with lots of miles and few cold start heat cycles as well as being in an arid environment and having a dedicated mechanic helped it reach a round trip to the moon and back. Great new tools for the toolbox on my shoulders. Thanks Paul.

@troyberecz707 2 года назад

Variable input: What symptoms would lead you to look at cylinder rings and/or cylinder walls regarding misfire on one cylinder? Ruling out plugs, wires, injectors, and coils.

@bobbastion7335 5 лет назад

Soooo, the number 3 was losing compression intermittently but (face) with a regular frequency? Which would indicate that the hydraulic lifter is collapsing? I don't get it Big Dan.

@newacinvention3951 4 года назад

Excellent call

@chrischiampo8106 6 лет назад

Thanks ScannerDanner Great Info 😎👍🏼

@dragan3290 10 месяцев назад

Excellent video. Subbed and liked 👍 cheers from Australia 👍 ❤

@throttlebottle5906 6 лет назад

I say broken exhaust spring, it sounded like it was alternating/cycling while running. the broken spring is riding up itself and dropping back off the other piece, probably broken near the spring base =p

@ufarkingicehole 4 года назад

What about the perfect vacuum.?

@dcomputers 4 года назад

@@ufarkingicehole its intermittent wouldnt the valve spring be consistent. lifter seems more like it. maybe slow to pump up

@ufarkingicehole 4 года назад

@@dcomputers the vacuum being constant makes me believe the valve springs are ok. It sounds like the lifters are tapping or not priming properly. Based on that alone I would assume the bottom end is ok. The valves are sealing. I would want to run a test to see if all of the cylinders seem to be doing what it's supposed to. I would want to know if its running lean/rich/ or ok. Possible sticking injector? Hahaha so I actually watched the video and yea..... I'm sticking with a jacked up lifter

@zbynekm2918 3 года назад

@@dcomputers Not necessarily, I had cracked valve spring on 2 GR Toyota engine and the problem was intermittent. I do agree that in this case a lifter is probably the suspect. Great work by Paul as usual.

@courtneysmith4354 6 лет назад

great video paul

@santichamorro167 6 лет назад

Here from holland thank you again for this video!

@ScannerDanner 6 лет назад

thank you for watching from holland!

@FullromFrank 5 лет назад

I have a 2011 Mazdaspeed3 with 123,000 miles on it. I get a code throwing P0300 (multiple random cylinder misfire.) I’m about to throw new sparks in and I have a compression tester, I just don’t know where to start. It seems to make this low “popping” noise at idle every here and there, but nothing else after idle. Please help! I’ve looked all over mazdaspeed forums and all other people have said is the injector, sparks, or coil packs. Thank you a ton!

@movingupautodiagnostics8645 6 лет назад

Haven't been able to watch much since Hurricane María sent us back to the stone age, but now that I could watch this I have to thank youfor all your work. Shalom brother.

@ScannerDanner 6 лет назад

Shalom my friend. Are you okay now? Do you need anything?

@movingupautodiagnostics8645 6 лет назад

ScannerDanner We're ok thanks to The Almighty. We have no power and water comes and goes, I've been able to work on a local auto repair shop and we're slowly coming back on our feet.

@movingupautodiagnostics8645 6 лет назад

ScannerDanner We're ok thanks to The Almighty. We have no power and water comes and goes, I've been able to work on a local auto repair shop and we're slowly coming back on our feet.

@ScannerDanner 6 лет назад

I didn't know you were doing videos now! And I didn't know you spoke Spanish. How many repair videos do you have up?

@movingupautodiagnostics8645 6 лет назад

ScannerDanner I have 13, and I'm from Puerto Rico, spanish is my first language. I have a TPS code video that I did with techniques I learned from you. Thanks for everything Paul. btw, I sent you a Google Hangouts invitation, check it out!

@hankthebugman 6 лет назад

My 2000 Grand Caravan gave me 343000 km (215,000 miles) before packing it in. 3.8 L engine. There is no substitute for timely maintenance.

@HondaTrumpAi 4 года назад

Isn't it a 3.5L???

@angelozararis7404 4 года назад

Yes very true 1 have 2003 with 365.000 miles original engine and transmission i bought new. Still runs but body rot is bad.

@PIANOSTYLE100 4 года назад

@@angelozararis7404 I have 270 k on my 1999 Chrysler Town and Country. Also have done various repairs on it. The have amazing pickup on them.

@83mike860 3 года назад

Mine has a misfire .. going to the shop.. just replaced all seals from intake manifold to the air filter all new injectors .. hands are up but not going to let her go down

@83mike860 3 года назад

@@PIANOSTYLE100 mines 270k miles 05 .. I love .. (yes alot of work and ppl yelling my just go buy new .. nah I can't give her up .. even with her Mis#5

@ichwilltanzenmann 5 лет назад

hi scannerdanner did you check the higher rpms (2000+) on that car? I have the same symptoms on my 1995 mustang 5.0. misfire but only at idle. ignition system is good. no vac leaks (constant 20 in hg). fuel system is fine. injectors also. engine rebuild done. but the lifter werent replaced. I'd like to check them before replacing parts with no end. your help is appreciated!

@lubacotemobile 4 года назад

I run from people who drive a car for 150K miles with no maintenance and then want you to tell them what's wrong for free and fix it for $100 bucks.😕

@fgonzalez78959 4 года назад

Then when you find out more stuff is about to go out that will affect the first problem and you tell them...they always say " well you said this not that so now you want more"

@ufarkingicehole 4 года назад

"I thought you said it was part A. Now its B and C too? Well then" or " parts B and C were fine when i got here. You will fix B and C for free!"

@ryuhado7253 3 года назад

sounds correct

@isorozco511 Год назад

I agree such fun work to do and potential to make money ruined by cheap ass hood customers who cry when you mention diag fees and always say “can you just take a look at it?”. Fuck them

@jc199159 Год назад

@@ufarkingicehole if it’s not part A then your diag wasn’t correct, how’s that the customers fault? If you said you fixed the problem, yet it continues, then you replaced a part that didn’t need it. This is why we have expensive lab scopes and shit, you don’t throw parts at a car and expect a fix, you find the problem and figure out the solution.

@BigDog50001 6 лет назад

The crusher is the appropriate fix for that vehicle....

@throttlebottle5906 6 лет назад

the day it left the new car lot, or the factory assembly line :))

@xdygmnyrdf 6 лет назад

It will be shipped to some 3rd world country, and be driven around there, for a few more decades ;)

@nncoco 5 лет назад

3rd world taxi or delivery van.

@markmacias8263 7 месяцев назад

In the past have found as the valve is turning a warped valve face will intermittently not seal properly. its usually thinner on one side on the exhaust valve side. I made this repair back in 2009 with a year model 1999 town and country /200,00 and its still running good today. My point to new technicians, be confident in your diagnosis and don't be afraid to repair instead of replace.

@SouthMainAuto 6 лет назад

Nice find Paul. Gravy :D!

@ScannerDanner 6 лет назад

Mr. O! I was told I should have given this van to you since you like them so much? Haha, don't know the background there but I'm sure it's good. Hope everything is well with you and you family. Thanks for dropping by.

@SouthMainAuto 6 лет назад

Oh it is just because I work on so many soccer mom vans I get called the "Dodge Caravan Channel." Looked to be a classic broken exhaust valve spring. Been cool to see it through but if they are a toilet why go any further.

@SmittySmithsonite 6 лет назад

HAHAHA! A wheeled toilet. I've owned my share of those over the years ... Loaf ... turd ... POS .... so many names for them! :D

@ScannerDanner 6 лет назад

Exactly

@devoncoolman88 6 лет назад

Im with eric on the broken ex valve spring. Seen it many times. Same on windstars.

@deepbludude4697 6 лет назад

Nice Troubleshooting skills!

@gearwrench877 6 лет назад

omg i died @ butt face thank you for making my day

@josepeixoto3384 4 года назад

Thanks,that is VERY nice; then it becomes guessing; need a compression test, with the old compression gauge, oil in the cylinder (don't think it's needed here, lol), and valve cover off.

@wildkev1010 5 лет назад

What cahnges are you looking for when you do the cylinder spark test with that tester?

@RC-Heli835 4 года назад

Hey I've never seen you get the vacuum gauge out Scanner!😀 There was an old school race mechanic telling me a while back that you can tell a lot about an engine with a vacuum test.

@danhalfhill9169 6 лет назад

Great diagnostics!! I'm so glad I don't work on those crappy Caravans anymore. Oh wait, gotta fix one next week....ugh. Well, it rare that I have have to fix them. Better than the Ford Aerostar, those uber-suck.

@michaelelliott289 5 лет назад

Hmm, it may have started due to the insulation of that injector at that cylinder. It's always happens at cylinder that is closest to the firewall.

@jimmyfavereau 6 лет назад

nice vid Amigo thanks and God Bless !

@glendekoker3682 Год назад

Nice work, I'm getting low oil pressure bounces around GM 4.3 high millage think oil tube loose?

@mr88talent 5 лет назад

So, I wonder if the timing chain is worn enough to alter overall value timing (seems that rattle could be the timing chain) and a lobe or two on the camshaft (or like you suspect, a lifter) may be worn adding to the problem. But as far as engine rattle noises go, the rattle could also be the alternator coupler.

@ThunderbirdRocket 8 месяцев назад

I’m thinking that a timing chain problem would affect all the cylinders

@mr88talent 5 лет назад

At 3:37 Cylinder drop test. I had just replaced my coil with an aftermarket and the car was running no different than the old original coil. I did the cylinder drop test with a test light and after I did, the car was hard to start, but it did run once it started. Apparently I had damaged the new coil, so I put the original back in and it starts easily again. So beware, in my case this test damaged the coil.

@billyyoder8171 6 лет назад

Thank you Paul.

@michaelovers688 5 лет назад

Valve spring broke have seen this before intermittent missfire

@robertoyzayda 5 лет назад

You are amazing, your knowledge is exceptional.

@robrohrke8694 5 лет назад

If I have no 5 volt reference from the pcm to the egr will it throw a lean code and misfire code? In a GM 3400 pos. I tested the egr and it was opening and closing when powered from the battery but I got nothing from the harness for voltage. I have a vacuum leak too I found but I sealed it and nothing changed so I’m leaning towards the egr issue but it’s not throwing an egr or evaporate code. Ecm screwed maybe?

@dwainkowalske3060 7 месяцев назад

I had a dodge minivan with a 3.8 many years ago with a very intermittent misfire on cyl. 3 that it took months before they could get to the shop with it still miss firing. It turned out to be a cracked exhaust valve on cyl 3.

@TheSuper6574 5 лет назад

Hi! I have a 1999 Toyota Ford Runner which is giving me problems starting it in the mornings.When it does start i have no more problems restarting the engine.This is happening to me in the morning time when i go to start it up.I'm in New York City queens would you also have a mechanic that you can recommend in NYC? Thank you for your time.

@Ali-dp6vo 2 года назад

Great info bro thank you

@davidweum9334 4 года назад

Is there such a thing as a spark plug extender for cylinder that foesnt lift up all the way. I've had a lower pressure in my third cylinder on an 8 cylibder old ' 76 F150 and I just removed spark plug wire knocking out two cylinders but it drove for my purposes on 6 cylinders for quite awhile.

@bobleonard9358 4 года назад

Great video. One question though. What would you look for if you actually took off the valve cover?

@ScannerDanner 4 года назад

IT would have been a shot in the dark but maybe a broken valve spring but I do not believe that was the case here.

@swfloridacarguy1987 6 лет назад

Another good vlog, a case of why put good money into to bad. Honest call at 160,000 miles...

@romeosautorepair2506 4 года назад

Love your work your are a walking brain

@AndreyYeltsov 5 лет назад

Can I rely on OBD data to find out the right time to change spark plugs? If I change "old" spark plugs based on the Toyota maintenance sheet, they look like new.

@starrlehner1881 2 года назад

changed number 1 plug, coil and new air intake sensor 2014 Town and Country. finally, engine started smooth yet little peck. Took off and about 15 seconds of driving back to jerking. Help.

@TheGeno2001h 2 года назад

Thank you for your help

@rusty6666 3 года назад

I dont think i woul fix it but i would do a tear down just curious to find out the problem for sure .. Thanks for the video take care...

@R.E.HILL_ 6 лет назад

Nice one. Not including what happened to this gem of a vehicle, is borderline cruel...

@jimenezautorepair4450 6 лет назад

Hi Mr danner yes everything is good now. Since I logged in with me and my wife's Facebook account lol. But everything is good now and happy I will see you're very good videos you're the best teacher I ever had. Big THANK YOU MR. DANNER and to you're son that he's helping you do the videos say hi to him for me thanks .

@ScannerDanner 6 лет назад

Thanks bro! Really appreciate you being a SD Premium subscriber.

@frankcrawford416 5 лет назад

I have the same van, same year, same color, and yes a leaking radiator. I got one of those intermittent misfire codes I think 0P300 I believe. It seems it could be anything according to u tube. Must be the worst code to diagnose, as it could be egr, cam and crank sensor, almost anything but a single cylinder issue such as bad spark plugs and, wires or valves. I don't want to just replace parts as it gets expensive. I may need to take it in. I did do the spark plugs and the gaps worn to well over 10 thousandths easily. Wonder if this could have caused intermittent misfire. Can u tell me how to reset the computer to see if the codes come back? Thank you.