crank,no start

Asked by GuruLNCZW Apr 14, 2019 at 10:22 AM about the 1996 Chevrolet C/K 1500 Cheyenne Extended Cab LB 4WD

Question type: Maintenance & Repair

Have a 1996 Chevy K1500, 5.0L 305 Vortech. Had a P1351 code, found that if I unbolted coil and bracket from engine block and positioned bracket so it did not contact any other metal, truck will fire and run perfect, Ground issue? If so ho do I fix it?

4 Answers
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oilyspill answered 5 years ago

I think something wrong with coil? Just my opinion. The ignition module grounds primary circuit of coil in order to induce spark. The ground is a pulse. A solid ground and there is no spark. That's the way I understand it. The coil shouldn't ground to mounting bracket or metal part of engine. I'm not an electrical engineer. Your post is interesting.

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GuruLNCZW answered 5 years ago

coil and icm are both new, didn't have issue after installing new parts, came on sudden , after about 2 months after replacing coil and icm, sent truck to carx, they couldn't figure it out, kinda came across unbolting coil&icm bracket myself by accident

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F_O_R answered 5 years ago

Maybe the coil has developed a bad spot in the insulation, when it touches metal it is grounded and it shorts out. Try a new coil.

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