Jaraxle

So I've been chasing a cylinder 4 misfire / multi-cylinder misfire for over a year... Maybe even 2+ years....

1.) Replaced injectors with FIC 1650's (from FIC 1200's)
2.) Replaced Spark Plugs (NGK of course)
3.) Replaced all four coil on plugs (COP) with OEM units from dealer

It is coming up FASTER after an ECU code reset now. Sometimes as quick as TWO starts & runs of the car.
I'm open to any ideas on what the problem is, since I have replaced everything I would think that would be related.
The car is running fine, idle is sometimes a bit rough (on more % gasoline) but I am still smoothing out cranking tables, etc as the tank transitions from E80 to E17 to E10.

Biggiesacks

I've dealt with these codes when tuning injectors / maf on my own car. So it's possible it could be an issue in the tune.

If you read out the codes it should tell you basic info from when it triggered the code, like RPM ,throttle position, coolant temp. You can use that info to compare against logs and the tune.

ViciousLSD

iTrader: (2)

I just turned off the check for my code. I've been racing the crap out of it but I dont feel any issue. My code normally comes out on the 2nd cold start, guessing the code was logged on the first drive. It's better so i dont have to ignore the light. The car is still great 2 years after