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Re: 2002 5.3 need help troubleshooting
corroded plugs, worn wires, dead coil, coil pack ground not attached, clogged injectors or bad gas. FPR diagphram broken/not holding pressure.
Vacuum leak, internal pcm ground bad, or any of the wires not hooked up during the wreck or clip removal.
How did it wreck and did it run/drive after the wreck? Need more info.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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