99whiteyukon
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- Jan 5, 2007
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Hello I have a 96 GMC Yukon with the 5.7. In the mornings it will run smoothly for about 1 mile then starts cutting out and backfiring in low rpm then you can stomp down on it and it runs great. Throughout the day it smoothes out a bunch it is worse in the mornings. I have new plugs, wires, cap, and rotor and coil also. It threw a code once and it was random misfire what would cause this???