vinyvolingy
Passed Driver's Ed
So it was your valves lol, that looks nastyyy glad you got it taken care of.
6
Another misfire thread, P0300 & P0302
- Thread starter chapusin1
- Start date
ina12K04gti
Ready to race!
I recently threw codes for random multiple misfires p300 p303 p304 etc. Even though my car is still under warranty I took it upon myself to install r8 coil packs & new plugs. I scanned it again & came up with the same codes, took it to the dealer & they replaced all four injectors under warranty, not two weeks later I have the same problem. I have only 19K miles & it only seems to misfire at idle. I will be taking back to the dealer but starting to think this is a software problem.
allset
Go Kart Champion
skotcoop
Ready to race!
Im having the same exact issues but on all 4 cylinders. I'm stage 2 as well but only have 26k miles. It does run a little rough sometimes when its cold. I'm not sure where to go after changing plugs and coils after the first CEL. That was probably 2000 miles between CEL's.
DarianBx3
Ready to race!
What did you gap your plugs to? Are you on the 'updated' APR file?
It's not totally useless, its been shown to cut into some carbon and help. There's a video of an audi getting done that looks pretty good afterward.
skotcoop
Ready to race!
Yes its the latest file. I gapped them to .024 as instructed by APR. I just got PolorFIS so now I can watch in real time as they happen. Its kinda crazy how many misfires actually happen that arent throwing codes. Not sure how normal that is.
That stuff doesn't have PEA in it anymore supposedly. I just used gumout that has PEA in it, it, and my last tank was 450.7 miles or after fill up 31.6 mpg with the paper and pen method rather than the car (which said 32.2). I put it in the oil as well.
I really want to try archoil which supposedly has the ability to slowly break down and remove carbon for both diesels and DI engines. https://www.amazon.com/gp/aw/d/B00W...=1&linkCode=xm2&pc_redir=T1&tag=usacarkits-20
DarianBx3
Ready to race!
This is interesting, I love finding out about these things. I know you can get an engine oil analysis done, but how would we be able to get data on doing this sort of stuff?
.024 and still throwing codes? I was about to gap down to .024 this weekend. My PolarFIS shows a crazy amount of misfires also. Mostly sitting at red lights or at cold start.
I don't know lol. I guess using a borescope over a period of time maybe.
I have been struggling with this for months trying to avoid another carbon clean out. I performed on 25,000 miles ago. Replaced plugs and boots, fuel filter, and tried some Lucas fuel injection cleaner after. After the missfires, I would clear the code and the car would run fine, only to missfire on the next cold start. I noticed some oil on the pcv breather hose at the intake connection, and decided to replace it. Bam, no more motherfuckin' missfires!! I hope this helps someone else