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Random misfires

chrisLB

chrisLB

New member
So the new engine in my car is idling rough and I'm getting random misfires in cyl 3 4 5 6.. It's runs fine when cold its just when it warms up... It has new wires new plug new coil packs and the vacuum lines are fine. Any ides?
The mods are headers 1.9 rockers 3.3 pulle zzp ECM.. No cat zzp exhaust
 


had this same problem swapped injectors around as it was a little confined but it ended up being a bad fuel bump but Id say check the usual culprits fuel pressure test injector harness test and finally injector test after that you can rule out fuel flow another thing would be the the ICU the coil packs mount too and the ground wire from it that connects to the engine block if your able to scan check your ltfts and make sure its not running to rich or lean.other common things to check would be tapping on your MAf to make sure its not on its way out and sending bad reading
 
Maf is new but I know it got coolant on it, maybe... Lol I had a leak from the throtle body that stalled the engine but fixed that...
 
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