2014 jetta misfire P0304

Follow along as we diagnose a misfire on cylinder 4 on 2014 Vw Jetta 1.8L Tsi engine with letter code CPR. p0304
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Misfire diagnosis applies to the following codes
P0301
p0302
P0303
P0304
P0300

[@Markb8608]

Thanks Richard. I really like your videos. I donated to kansascity before. Will donate again. Thanks Mark

[@CoolAirVw]

thanks so much.

[@CoolAirVw]

I see your name so often in the comments I feel like I know you.

[@tj2521]

@@CoolAirVw the car is defeating

[@CoolAirVw]

I've been noticing you on FB Tdi group.

[@danman9017]

love those mystery ,why there lot of oil in that cyl, thank for your great video

[@CoolAirVw]

dont know for sure. It has to be coming from "above" I think. If the customer gives us the ok we'll take it apart and see.

[@maxthecaddy8451]

big fan of the older vw but the newer one's are piss poor, good vid 👍

[@CoolAirVw]

thanks for watching.

[@moulayediag3873]

thanks a lot for sharing

[@CoolAirVw]

thanks for watching

[@autoscan7otto489]

Great vidéo for me have same thing with a peugeot 1.6 vvti and found a cracks in a head thanks

[@CoolAirVw]

very interesting

[@nathanmartin5529]

Hey, have you installed a sachs g60 clutch and flywheel (21 lbs) on an mk4 tdi before? Mine is super noisy when you are in neutral with the clutch out. It's louder than the engine. It goes away when you put the clutch in, and everything works like it's supposed to. I know these are known for having lots of clutch chatter but it seems a bit extreme. The kit I bought had a new throwout bearing, pressure plate, clutch and flywheel and I'm positive everything was installed correctly.

[@CoolAirVw]

Installed lots of them. Never had one "louder than the engine".

[@nathanmartin5529]

@@CoolAirVw Hmm. I'm not sure why the noise goes away when I press the clutch in. Maybe the input shaft bearing on the 02j? I dont recall it making that noise when it was on the donor car. I don't hear the sound in gear with the clutch out.

[@CoolAirVw]

@@nathanmartin5529 that's what they do with a solid flywheel. I can explain it but its too much to type. You may want to get it to someone near you who has experience with tdi's and solid flywheels. Dont go trying to fix something that is normal.

[@nathanmartin5529]

@@CoolAirVw I took off two metal "spacers" off the end of the crankshaft and behind the flex plate for the torque converter when I did the swap. I didn't think these were needed for installing the flywheel because I believe there weren't any on the donor car. I can't even find pictures of them online, I'm starting to think I shouldn't have removed them. Do you know whether or not there should be any there?

[@CoolAirVw]

@@nathanmartin5529 You do NOT use them on manual cars.

[@the2120company]

wow, thanks for video. so advanced virtually that cant stand reality mine field.

[@CoolAirVw]

Ah, excellent. Auto diagnosis and repair is a "reality mine field". Love that!

[@jonyhopkins1]

Good video . Please how to know which is cylinder number 4 or 1

[@CoolAirVw]

cylinder one on the car in this video is the one on the right side of the car. cylinder 4 is the one on the left.

[@x-man4702]

How many miles are on it?

[@CoolAirVw]

I dont remember.

[@ronnyortiz173]

I have the exact same issue. Ive been dealing with it for the past 12 months and they can’t seem to fix it

[@CoolAirVw]

misfire can be lots of stuff

[@matthewblue7839]

Physical connection doesn’t mean you have continuity? Need to use a MM to confirm ?

[@CoolAirVw]

no inteiendo

[@christesta2521]

Richard maybe you can give me some direction. I have a 2015 Jetta 2.0L 4 cylinder non GDI with 39,000 miles in excellent condition with no oil or coolant leaks. I have intermittent P0302. Intermittently the car will run rough and set the code. I can shut off the car and restart it immediately and the engine will run smooth again. This issue may happen once a week or once a month. Some of my freeze frame data is Closed Loop, Load 85.9%, short term fuel trim 3.9%, long term fuel trim 0.8%, Map 29.2 (in Hg), IAT 52 (F), Baro 29.8 (F). Injector voltage is good when I checked, fuel pressure good. I'm leaning towards the number 2 injector possibly hanging up. I'm a retired tech and no longer have access to a scope and basically down to possible hanging up. I'm a retired tech and no longer have the use of a scope and basically use a 10 ohm multi meter and Autellcode reader. Any direction would be greatly appreciated.

[@CoolAirVw]

Does the car misfire then set the code or does the code set and then the misfire is present? Go drive it again to be sure.

[@christesta2521]

@@CoolAirVw Hi Richard, The car misfires first. If it misfires long enough then it sets the code. But the misfire is definitely first. It's tough to catch because this issue is very intermittent. Thanks Richard

[@CoolAirVw]

@@christesta2521 I assume when you say "non gdi" that means this is a nonturbo 2.0L, like the legacy 2.0L??? If so, I would be looking at spark wires, coils, plugs ect.

[@christesta2521]

@@CoolAirVw Hi Richard, Yes it's a non turbo 2.0 liter. The coil packs on this version look like one unit. Not individual could for each plug. I'll ohm out the ignition wire for #2 and see if there is a spec for the coil pac.

[@CoolAirVw]

@@christesta2521Ohm checking is worthless in this situation.

[@HardWhereHero]

My 2004 2.0 is misfiring out of no where on cylinder 4. I have a scanner hooked up to my car while I'm driving. I'll get p0304 and after I REV it up or shut it off and back on the car will run fine. Coilpack, plugs, wires have all been replaced with OEM quality parts. I'm stumped but then again, I'm not you.

[@CoolAirVw]

injector, compression, or water or oil intrusion into cylinder all come to mind.

[@BenStOnge-ij6oh]

So was there a resolution

[@CoolAirVw]

yes, watch the video.

[@Wolfnap313]

@@CoolAirVw I didn’t hear a resolution. I heard it’s not good news and if the customer wants to fix you’d make a fix video.

[@CoolAirVw]

​@@Wolfnap313 Oh, I see what you mean. My recommendation was to pull head and inspect. customer declined.

[@ThePelsorFamily]

Sir, i thought i had deja vu, 2:50 is repeated at 3:50,lol Editing is fun,huh sir...

[@CoolAirVw]

I made a mistake once before.

[@alexanderaguilera5202]

Thanks man what what’s the problem I really appreciate

[@CoolAirVw]

whats the problem with what??

[@alexanderaguilera5202]

With the engine I have the same problem I’m still working on it

[@alexanderaguilera5202]

I have the same problem

[@lobinhouiui9523]

and me here with my car that is exact the same, but with misfires in all of cylinders 😃

[@Wjsfkeh1]

So all you did swap coil and could not even find the issue

[@x-man4702]

That's a CPRA engine, they oil rings are clogged and the oil just passes thru. Put 4 new spark plugs and call it a day. Misfires on these engines will throw a bunch of related and unrelated codes, change the plugs and reset the codes. It's not a long term fixt, but it will buy some time for the customer with little money out of pocket.

[@CoolAirVw]

Nope oil is coming in from the top

[@x-man4702]

@@CoolAirVw How many miles on it?

[@x-man4702]

@@CoolAirVw How is oil coming from the top?

[@CoolAirVw]

@@x-man4702 Leaking oil from valve cover area through crack in cylinder head into cylinder. Possible through head gasket into cylinder. If I recall correctly, I was able to watch with the boroscope the oil run down they cylinder wall on to the piston.

[@x-man4702]

@@CoolAirVw That doesn't sound right, those engines are not known for leaking oil from the valve cover gasket, especially being a 8 year old car (seals are still pliable). Most Jettas don't have a coolant temperature sensor (gauge on the cluster) and they could overheat due to a coolant leak (holes in radiator from road debris) and the customer not know about it. That will cause severe engine damage as you know.

[@zaino660]

So, you didn't fixed...ummm

[@CoolAirVw]

customer ok'd work but we are waiting to start till they bring up deposit.

[@RodrigoMancillaPhoto]

@@CoolAirVw was there any news on this car? Did you ever find out what the problem really was?

[@CoolAirVw]

@@RodrigoMancillaPhoto We put an engine in the car I think.

[@leomcalla29]

Good to see your video this morning I didn't really enjoyed this one because I think you fell down diagnosing this one. This Diag. Is inconclusive and I'll tell you why. You did not investigate the ignition system, why was the computer complaining about a circuit fault for number cylinder #4. You should have find out why before getting caught up in why the oil is puddling in the cylinder. It would be unfortunate if you replace that head and then have to explain to the customer why the car is still missing on cylinder #4. Then it gets worse he needs a ecu because #4 coil driver is damaged and you missed it in the diagnostic and your estimate. I hope you looked into that coil circuit code before you call the customer, Lets do it right and cover your ass.

[@bernardaflores1720]

The car is probably high mileage and w/ direct injection the valves are probably full of carbon at this point.

[@CoolAirVw]

the value in a video like this isn't that I, or anyone finds every defect, so the customer isn't upset later. Certainly that is a concern for any shop and for my shop. But the value is that the Average Joe who watches knows that oil contamination can cause the misfire. I have other video's covering bad coils, ignition coil trouble codes and even bad computers not firing the coil.

[@zaino660]

The solution is pls don't buy this pice of shit VW..So so bad

[@CoolAirVw]

Thats one way

[@josereyesguardado6099]

Video to long

[@CoolAirVw]

Thanks for the constructive criticism. Can I ask what information of the diagnostic process I should leave out? Or maybe I should just have a 1 minute video that says, "check for oil in cylinder", then its over?

[@Steve0885]

too* apparently you aren't a technician