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post #1 of 6 (permalink) Old 06-13-2016, 11:48 AM Thread Starter
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Missing Only when Driving

its a 2.2.... recently taken out and rebuilt for boost. After putting it back in it seems to misfire at about 2500 to 3000 and during decel. almost like it starving for fuel. (after this started i rechecked headbolts...end play and everything to make sure it not internal) seems like a fuel issue? or cat problem? please help
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post #2 of 6 (permalink) Old 06-13-2016, 12:37 PM
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Has it already been tuned and/or boosted? Are there any check engine lights? Sounds kinda like a problem with the air/fuel mapping.


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post #3 of 6 (permalink) Old 06-13-2016, 01:02 PM
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Definitely sounds more like a tune issue than anything else assuming it has already been boosted and tuned
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post #4 of 6 (permalink) Old 06-13-2016, 02:26 PM Thread Starter
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no tune..its 100% built to stock specs. so no reason it shouldnt run perfect on stock ecm. i have a knock code.. so maybe timing is making it misfire. knock code is pending but not a full on fault. maybe the knock sensor is bad and is retarding/advancing timing too much causing the miss?
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post #5 of 6 (permalink) Old 06-13-2016, 02:36 PM
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Sounds possible. Do you hear a knock?


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post #6 of 6 (permalink) Old 06-14-2016, 09:45 AM Thread Starter
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no knock at all. i wonder if the harmonic balancer could throw a knock code.. it had to be somewhat pried off when i re did the internals. and it a a tad ....i mean a tad wobbly.
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