I have a 94 gmc seirra z71 5.7 liter 350

Asked by Jason Dec 09, 2013 at 08:21 PM about the 1994 GMC Sierra C/K 1500

Question type: Maintenance & Repair

Truck starts up idles great, drives
great untill trunk warms up, still idles
good, will drive fine untill  you push
pedal down to floor, it starts missing
and backfires

3 Answers

39,725

the old high tension wires are letting the spark find an easier way to ground, look fro grey powder around heavy wires at loss spot

Your Answer:

Sierra C/K 1500

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