To do a compression test does the vehicle need to be at operating tempature

1987 GMC S15
220,000 MILES
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JIMYJAMES
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and does the accelerator pedal need to be to the floor when cranking the engine.
Sep 17, 2012 at 5:42 PM
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ASEMASTER6371
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no, can be cold or hot.

yes, hold the pedal to the floor

Roy
Sep 17, 2012 at 5:47 PM