N54 Misfire Cylinder 3, Around 8k miles ago I replaced all I've got a misfire which I can't seem to solve. us My Yahoo!. Someone up above mentioned swapping injectors with Ripping what's left of my hair out fixing a plethora of issues with my 06 335i N54. 6). The car only misfires after it has been driven for some time with several stop/starts in the middle. Activation map cooling. The misfire occurs once the car is warm and idles for more than a minute or so. The time now is 08:12 AM. Whenever it acts up MHD reads multiple or all cylinder misfires. This was cleared by replacing the thermostat. pt7gcm9scaicovvgrtbufsqph8umkxcbjfoym8luz5cwtjhdkgyncp5