Misfire on MY93
#1
Misfire on MY93
From cold the engine starts and ticks over fine. As the accelerator is pressed there is a slight delay before the rev's increase then after that the occasional misfire. As it warms up the misfires get worse till it wont tick over and sounds like its running on 3 cylinders. Eventually it wont tick over and stalls.
Checks so far:
- ECU reset, No code showing.
- All coils tested with strobe and seem to be working.
- Unpluged MAF on tick over and engine dies straight away, so am guessing thats working.
I'm lost now Does anyone have any suggestions?
Checks so far:
- ECU reset, No code showing.
- All coils tested with strobe and seem to be working.
- Unpluged MAF on tick over and engine dies straight away, so am guessing thats working.
I'm lost now Does anyone have any suggestions?
#5
Originally Posted by speedracer
Leads are new performance ones so I'm ruling that out and all the plugs seem to be fine.
#7
Its definitely heat related. About 30 seconds after starting the car from cold it starts to misfire. So am starting to think its something worse than just leads. It died whilst on full boost and it had slightly to much oil in it, could it be a mechanical problem?
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#9
All coils seem to be giving off good sparks, I pulled each off inturn whilst running the engine. There are no cracks in any of them and each tested at 50ohms.
Shes getting towed to the garage now... this is going to get expensive
Shes getting towed to the garage now... this is going to get expensive
#10
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to much oil can cause problems, it can also affect your boost solenoid however I dont think this would cause your misfire. It may be a case of removing all induction pipework and the intercooler and checking for oil in there. If there is then give it a good clean out with something suitable and drain some oil so that you are with the min and max range.
#12
Is that the only problem having too much oil would cause? I'm guessing it would increase the oil pressure slightly. Maybe increased pressure behind the cylinders leading to mechanical failure. I'm hopeing its not this, but its not making any nasty noises so fingers crossed its not that.
#15
bloody lucky there fella my 93 wrx wagon is sat on me driveway waiting to have a service and cam change but cant afford it at the mo so thought it was best not to drive it until the work is done!!
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aaron_ions
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03 November 2021 11:07 AM