Misfire no codes

Asked by Guru9QVG2 Jul 08, 2017 at 02:53 PM about the 2004 Chevrolet Trailblazer LS 4WD

Question type: Maintenance & Repair

So I have a 2004 Chevy trail blazer 4.2 engine. I
have owned the vehicle since February. It is
misfiring but there is no check engine light. I have
had it scanned now 6 times and have no codes
that are popping up or stored. I have replaced
cylinder 1 and 2 could packs, all plugs have been
replaced.  I took into a local Chevy dealership paid
117 for a diagnostic to be told it was bad coil pack
on cylinder 1 and the sensor in the gas pedal.
Everything was replaced with new parts and it is
still misfiring with no light or code.. please help

1 Answer
11,225

FJ4072 answered 6 years ago

I 2nd the other items that can "mimick" a mis-fire. Bad motor mounts and/or tranny mounts will do it for sure.

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