Hi Guys,
So I am APR stage 2. Had NO misfires before I went stage 2. Now I cant get rid of them. CELs are for all 4 cylinders plus a random misfire code also.
Here is what I have done trying to correct the issue...
2 Sea foam treatments
Pulled intake manifold and did full carbon cleaning. (car had 59K) Definitely needed this. Valves looked great when I put her back together.
New Intake manifold gasket
Cleaned each individual fuel injector and put new seal kit.
New R8 coil packs (Already had a set installed, but from previous owner so I bought a brand new set and installed.)
Tried NGK BKR7EIX plugs
Tried Bosch Double Plat. FR6KPP332S plugs
Tried NGK BKR8EIX plugs gapped at .024 (recommended by GMP Performance Tuning Shop who did the stage 2 tune.)
Car will not stop misfire/ hesitation issue, but it happens at random. Runs good for a day, then runs like crap w/ heavy misfires and throttle hesitation, then back to good again. Car is running extremely rich it seems. Under very light acceleration it is registering 6-9 mpgs on the display screen where you can track this. Car is basically pouring on the fuel and not able to burn it all because the AFR is so rich I think.
Bad MAP or MAF sensor? Any ideas or experience with this? Its driving me crazy!
So I am APR stage 2. Had NO misfires before I went stage 2. Now I cant get rid of them. CELs are for all 4 cylinders plus a random misfire code also.
Here is what I have done trying to correct the issue...
2 Sea foam treatments
Pulled intake manifold and did full carbon cleaning. (car had 59K) Definitely needed this. Valves looked great when I put her back together.
New Intake manifold gasket
Cleaned each individual fuel injector and put new seal kit.
New R8 coil packs (Already had a set installed, but from previous owner so I bought a brand new set and installed.)
Tried NGK BKR7EIX plugs
Tried Bosch Double Plat. FR6KPP332S plugs
Tried NGK BKR8EIX plugs gapped at .024 (recommended by GMP Performance Tuning Shop who did the stage 2 tune.)
Car will not stop misfire/ hesitation issue, but it happens at random. Runs good for a day, then runs like crap w/ heavy misfires and throttle hesitation, then back to good again. Car is running extremely rich it seems. Under very light acceleration it is registering 6-9 mpgs on the display screen where you can track this. Car is basically pouring on the fuel and not able to burn it all because the AFR is so rich I think.
Bad MAP or MAF sensor? Any ideas or experience with this? Its driving me crazy!