backfire and a stumble issues
I have completed the CALC VET. Played with spark advance a little, it is running like a champ on hard accel and cruise. Although today I noticed a series of backfires in the tail pipe as it lifted the throttle at the top of a hill? And I have an anoing stumble or backfire in the intake, depending on the way I launch from a stop. Any ideas on where to start!! This is an LT1 with a TPI, 4L60E in a 4X4and using a 12200411 to run it all. Yes it runs real good!!
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