I have a 94 gmc seirra z71 5.7 liter 350
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
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
Was looking at coolant sensor, and the wire was melted
check the throttle position switch !
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