This is a discussion on Check engine light - Misfire in cylinder 4 within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; Originally Posted by brfatal ^ That was actually something I noted as well while reading the list. It was always ...
Bugeye Mafia Member #318.
2003 WRB WRX w/Gold Rota SDR 17x7
If it's their 9 lb flywheel I wouldn't doubt it's causing issues.
not sure if this fits into your problem... when i bought my car it was throwing EC for misfire on cylinders 1 and 3. did a compression check had 0 psi and 60 psi between the 2.
had burnt exhaust valves... rebuilt the top end car runs good still working on some issues due to taking over a car that was modded and having no info what has been done.
it still idles rough at some times does not throw a cell anymore but the o2 sensor has come loose a couple times causing it to sound like crap.
my car is set up to run stage 2 i dont think the guy had it flashed or tuned so i think that is throwing off the ecu pretty bad. sometimes you can smell like its flooding the engine but with the previous owner buring the exhaust valves makes me want to think it was running lean.
Bugeye Mafia #155
Friends don't let friends drive stock.
Racing a neon is like fighting a girl: you can't brag about it if you win, and you don't want anyone to know if you lose.
So I had my appt to take it in today to have it checked out and of course the check engine light is off this morning. I took it in anyway and they said it was misfiring on all cylinders and they checked the fuel and ignition systems and they were fine. They said there was some issue with the software and it looked like someone had tried to modify it maybe and never finished it out. So they wiped it out and re-flashed it and so far the hesitation is gone and they said the misfire is gone too. I got on it from a rolling start in second on the freeway on ramp and it was quite impressive compared to how it normally goes when getting on it.
I recently bought a 2003 wrx and my check engine light came on. I took it to autozone and the code came back as a cylinder 4 misfire, so I replaced the plug and coil pack but it is still misfiring. I also put injector cleaner in it and this is my second day running the cleaner but it's still running the same. any idea what it could be?
Current Car: 2015 Honduh Civic SIgh
Previous Cars:2014 Golf TDI, 2012 WRB WRX Hatch, 2004 RSX-S, 1998 Grand Prix GTP
"Isn't it amazing how smart you feel when you just aren't being stupid?"
The check engine light came on again and it started sputtering so I took it in and the rest is history.