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Subject Electrical, fuel or combo ...
     
Posted by JMartz on April 08, 2019 at 8:31 AM
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In Reply To Intermittent ignition nuisance - starting point anyone? posted by Woodnutz on April 08, 2019 at 08:06 AM
     
Message Assuming valve train is operating correctly and there is sufficient compression; engine misfires can be due to a variety of things.

1. Bad plug (this happened to me and nearly drove me mad)
2. ECU (got to ascertain the trigger signal is being sent)
3. Coil (swap-to-test or measure)
4. PTU (this one is pretty much a swap-to-test)
5. Harness (bad contact)
6. Injector (this is the combo)
7. Cylinder head gasket (this is accompanied by overheating or water in oil and others

     
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