Trolled around almost all the forums trying to look for answers to my symptoms. It happens randomly, but now it's getting worse.
I get Error P300 and P302.
Replaced coil packs x 4, plugs x 4. Disconnected battery for 1 hr. Cleaned various plugs in engine bay. Found 1 or 2 small boost leaks in the process. Disconnected MAF sensor and cleaned it. Ran it without MAF sensor, same. I had the BSH delete on, even swapped back to stock, same. Cleaned Forge DV and tested it. I've opened the plastics around the plugs for the coil packs, don't see anything funny. Did logs with fuel pressure's etc... Normal. It shows misfire on the other cylinders too, but nr 2 cylinder is the worst. Battery was replaced recently and charge rate is 13.8 volts, with lights on, and off.
What happens is on idle u can hear it mis. As you drive and give throttle, even less then 1/4 % it still misses. The only thing thats slightly odd is that my water temps changed more or less when the fault occurred. In traffic and on open road water temps sit at 77 -80 deg C. It's almost feels like its water temp related. When water goes to the normal 88 - 90 it feels fine.
Car is stage 2+ and this map was working for 6 months prior to this without any problems. So I don't think it's software.
Any 1 have some ideas ?