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Re: Base timing shifting when hot
Posted to Technical Discussion Forum on 4/15/2017 2 Replies

Again, this is just a good reference for you

[1990 GMC C1500 Sierra, Engine/Propulsion Waveform]

90 GMC 5.0

CH B cyl 1 idle running compression

CH D coil wire secondary with a ST125 spark tester in the cyl 1 spark plug wire and cyl 1 is firing 28 deg BT... Login to read more.

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