Still Having Misfires After Diagnosing Everything | AskDap

Q - Hello I've been having issues with check engine light problems. I have an CTS blow off valve, a CTS cat back exhaust with stock downpipe and muffler delete off the exhaust, and resonator delete. I've been getting a P0304 and now I have both P0304 and P0303. I've replaced all of my ignition coils, spark plugs and fuel injectors but I'm still getting misfires from my 3rd and 4th cylinders and I'm also getting a P2308 and a P2311 code which are the Ignition Coil C secondary circuit and Ignition coil D secondary circuit, beings though I replaced all of the simple parts that cause a misfire, what else can it be? I've been dealing with this problem for almost a year now but I just don't know what it is and the Volkswagen dealership can't pinpoint where the problem is coming from.
10mm Flat Wrench for MQB Ignition Coil Nut
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This video was shot on location:
Deutsche Auto Parts Inc.
10308 Bailey Rd
Suite 417
Cornelius, NC. 28031

[@kenj.8897]

Guys using the damn drills to take the nuts off . Zip Zip Zip , o damn . Great video as always Paul .

[@MartinTorres-vj8ig]

I’ve been having a check engine light on sporadically and specifically when it’s cold outside? Spark plugs and coil packs have been changed. Carbon cleaning next and injectors next?

[@shanthkannan3858]

I replaced clutch disc in Renault megane 2010, now engine is misfiring, engine light is flashing when i go above 30mph. codes says that multiple misfire detected. I changed spark plugs and ignition coils as well, compression is fine in all the cylinders. I connected OBD scan tool, no codes related to mass air flow sensor, now mechanics are investigating my car that the fault is in fuel injectors/fuel pressure or anything with electrical wire harness that is connecting with spark plugs.... I am really worried... Any leads/suggestions would be really helpful, thanks

[@carldavies2433]

Hi I have recently upgraded my HPFP and ever since that I have been experiencing a misfire well what feels like a misfire at high revs Would you have any idea what I have done wrong?

[@damionrose731]

Hey how can I get my hand on the wrench you spoke about??

[@karstgeo7290]

Done it...no damage but I crapped my pants when it happened....will be buying that wrench.

[@spincyclegaming8542]

I have a 13 mini cooper base model, thing was running great and while on the freeway got p0303 that's all I have is cylinder 3 misfire, compression is good, its not plugs coils or injectors I am at a loss

[@chrisprime10]

Did you ever figure out the issue?im currently in the same place and im honestly thinking it might be my headgasket or ecu im not sure tbh. its just on cylinder one, i changed out all sparkplugs, wires and coils, i have good compression at around 160psi but when i did take out the spark plugs which have less than 500 miles on them, on cylinder one its full of blacksoot which is why im assuming its the headgasket? its a 2010 cadillac escalade esv with the 6.2L V8 and the vehicle has around 73,800 miles on it. i almost forgot but i have also changed out the injector

[@donnahawke1466]

Hi what about crank sensor code put new one in still coming up and still misfire.

[@collensfiso2141]

I have a ford fiesta mk6 st 150 it's doing the same I don't know what to do

[@chrisjumper3198]

I have a 2014 Yukon XL 5.3 with a misfire on the 7th cylinder. I replaced all the spark plugs and the spark plug wire and only the 7th cylinder coil. I can drive the vehicle for a day and it will start misfiring again on the 7th cylinder. I removed the 7th cylinder spark plug and noticed there was oil on the spark plug. So then I went old school and put a nonfouler on and another spark plug and after a while of driving I would get another misfire on the 7th cylinder. Will you tell me what you think is wrong with the 7th cylinder and where you think the oil is coming from and what I can do to fix it? Many thank!

[@xxmobstrxx8535]

Same thing on my 16 Audi A6 2.0t changed injector spark plugs coil packs. Now I’m leaning towards the carbon build up since it was more random as the issue began but now it’s more persistent.

[@stevefaria8788]

Changed spark plugs and ingnition control module still have misfire

[@sarasanr4107]

Great video, my mysterious story until today is ... I have replaced VVT sprockets (know as cam gears or actuators) on 2010 petrol insignia, since day one the car lost of power at all, on the highway moves like turtle, gets the car+wrench light on and off if trying to force for power no codes came up on the dash. However, in a later stage the car start misfiring randomly following with the codes, and lately was confirmed as cylinder 3 P0303. Changed everything, spark plug, coil pack, injectors, nothing has changed, the dealers are lifting their shoulders, and i am left at mysterious crap. I didn't have any similar issues until these parts has been replaced.

[@kami_dred7319]

Did you fix it ?

[@insanityy9635]

This is my email, I didn’t even realize you did a video on this until now... I fixed the ground issue

[@joseambriz4418]

I have a 2011 Jetta 2.5 with P301 code that wont go away. I changed the ignition coil and spark plugs and code went away but two weeks later came back. The. I changed the fuel injector and the code is still there P301. Any suggestions?

[@dude_ofsteel9378]

So that was the issue?

[@pinnaclepainting9911]

Your carbon build up Theory matches the symptoms in my vehicle what would you do to correct that if carbon buildup is the problem?

[@caydenduran8451]

you have to take the manifold off and manually clean it. there’s a ton of video on it and it’s not terribly hard

[@theCAVEMAN023]

I changed my pcv and after the car ran like shit. Is it a bad pcv? I changed coils and plugs and nothing. I’m about to try injectors next. But my 1st guess would have been pcv is bad

[@patienceisalifesaver9582]

What did it happen to be ?

[@allenlwu]

I have a 1996 Toyota Supra. Changed all six spark plugs, it ran fine for the 1st few miles, then engine misfire, with code p0300, p0301, p0304, p0305. What could be the issue? Can you help? Thanks a lot in advance!

[@taniamorales1247]

We’re you able to figure out the issue? I’m having the same problem rn

[@taniamorales1247]

Were *

[@leomcleoud5130]

My Mk7R doesn’t have ground wires on any of the coil packs

[@intention21]

Must be a vacuum leak as it’s the hardest to find sometimes

[@charlestomasino9161]

Broken rocker arms may be the culprit

[@chadchristensen3703]

Not of the car of the ignition coils that's the thing underneath the coils

[@SLIM-iz3kl]

Hello. I have a 2013 ram 1500 I just changed spark plugs, coil packs and fuel injectors it's running fine but now I have a stored cylinder 4 misfire and fuel system rich 1/1 and 2/1 pending. Can you help me?

[@rxtube4873]

Did you find the problem with your ram 1500?

[@SLIM-iz3kl]

@@rxtube4873 yes its bad electrical wiring.

[@rxtube4873]

@@SLIM-iz3kl from where ?

[@SLIM-iz3kl]

@@rxtube4873 once I bought a new computer and replaced the fuse box no more engine codes. 🙃

[@SLIM-iz3kl]

Now I have lights that work sometimes and sometimes they don't. I'm thinking it's time to replace the whole wiring harness on the engine bay.

[@thomaseckard1292]

How can i get you and your shop to work on my car?!

[@rafaelalvarez2595]

My 2017 gti when I step on the gas I hear a binding nose from my engine compartment but no lost of power

[@joseambriz4418]

I have a 2011 Jetta 2.5 with P301 code that wont go away. I changed the ignition coil and spark plugs and code went away but two weeks later came back. The. I changed the fuel injector and the code is still there P301. Any suggestions?

[@SuperInterpol1]

I have the same problem as yours, I have replaced all the spark plug and ignition coil but the error code remains. My question is have you solved the problem and what was wrong? Thanks.

[@jeronimjurakovic2919]

@@SuperInterpol1 please can you answer what is the problem, I also did everything.

[@denaotto6444]

Same thing for me on my 2010 kia optima. I have a cylinder 4 misfire after replacing everything

[@victoriamccarthy3050]

@@denaotto6444 update?

[@denaotto6444]

@@victoriamccarthy3050 yes..I had to sell the vehicle. Got too expensive..I literally fixed everything and went to mechanic after mechanic

[@leonmalomane2270]

I drive Golf R 2017 . It misfire.and loose power

[@jeronimjurakovic2919]

Hey man, did you fixed the problem, my golf gti 7 went to safe mode, misfire. Can you please help me with the answer.

[@custompro52]

I have the same problem on a 2017 Golf R

[@ersinylmaz4172]

Pcv valf arizali olabilir

[@insanityy9635]

I’m thinking the dealer fucked up my car

[@faizalej3324]

Hi hope u can help me my mk6 gti 2.0 if i push 6000 rpm hAve misfire cylinder 3 and 4 is below 6000 is fine my coilpack and spark plug is good injector also good what that problem

[@stefjanssen4397]

Pcv valve

[@kaipeng0507]

I have the same issue. How did u solved it?

[@chadchristensen3703]

Change the driver