Hi everyone, just bought a 1997 jaguar XJR 6 cylinder and it has a miss, from cold, which appears to get higher up the rev range as it get's warmer. Once warm it seems to drive fine. It starts and 'ticks' over fine, it's just when you put your foot down quickly, it appears to miss. Gradual throttle and the problem is not there. No smoke or water issues. I'm guessing, electrical or fuel. I've removed a few of the coils and have noticed at least 3 have cracks up the thickest part of the shaft, would this be causing the car to break down? Any thoughts would be much appreciated!

Agree, the sparks somehow meets more resistance when the engine works hard.
I have 'lost' the alternator a few times in my old 2CV, and it will go far on battery, but it will misfire when I push the engine, more and more as the battery goes flat. That can only be because the sparkplugs sparks easier when the load is light.

Hi everyone, just disconnected the air flow meter and the running of the XJR didn't alter, is this correct??