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Re: Secondary ignition eave form gm hei distibutor
Posted to Technical Theory Forum on 4/20/2019 3 Replies

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Will cylinder 2 plug wire fire an ST125 spark tester.

[1987 GMC B6000 B6P042, Engine/Propulsion Waveform]

This is from a good running 5.7 engine

CH A is the coil secondary

CH B is a FLS press... Login to read more.

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