very strange problem with car running!!

**alan opel** · 13-09-10, 11:26

righto this is a strange one, i start the car, no throttle, leave it idleing its perfect, idleing for about 5 minutes, then i rev it, revs out perfect no missing or knocking etc, after about 30 seconds its starts to misfire badly

knock it off, start it up again, idle perfect rev it perfect, then itll start to miss again!?

ive changed coil packs, injectors, coolant temp sensor, throttle position sensor still no good! i wwas gona unplug coil by coil when its missing to see which cyl is at fault but i noticed yesterday when it starts missin there a strange rattle coming from the head? but not there when its not missing!? anyonne have any idea!? the only thing i can think of is that the head was sat for a long time, the lifters wer drained, maybe it could be a sticky lifter or valve? hardly!?

**Cefiro Panch** · 13-09-10, 11:33

I dont kno CA's at all!!

But perhaps not the coils but the sender unit or whatever its called, the yoke that sits on top of the cover like series 1 RB25's?

**alan opel** · 13-09-10, 11:43

Originally Posted by Cefiro Panch

I dont kno CA's at all!!

But perhaps not the coils but the sender unit or whatever its called, the yoke that sits on top of the cover like series 1 RB25's?

ya im goin to try that and a new set a plugs today!

**Rob32** · 13-09-10, 13:18

ya mean the amplifier?

**gary g** · 13-09-10, 13:29

i reckon its the plugs lad

**eileen** · 13-09-10, 13:36

ecu... have you tried another ecu?

**nikkisixx69** · 13-09-10, 13:38

Defo the coilpacks Alan

**gem-s13** · 13-09-10, 13:58

its still a ca!!

**2tonne** · 13-09-10, 14:04

did you check fuel pressure? sounds like its dropping after the prime?

**richiek** · 13-09-10, 14:14

maf sensor?

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