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Old 08-24-2021, 02:28 PM   #3
biketopia
Senior Member
 
Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,009
Re: 5.3 Gen 3 - Misfire/rough idle

Was it tuned for the cam, need to know which cam too. Just "stage 3" doesn't help as BTR sells 3 or 4 cams with stage designations. It most likely will have a lot of chop and a rough idle regardless. The first thing is to tidy up the harness, a new one, rework what you have, something. Crossed wires, poor splices, and bad grounds will wreak havoc on the system. Coil harness' not plugged in right or fully are a common problem as well.
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