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
  • MEMBER
  • 1 POST
and does the accelerator pedal need to be to the floor when cranking the engine.
Sep 17, 2012 at 10:42 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
no, can be cold or hot.

yes, hold the pedal to the floor

Roy
Sep 17, 2012 at 10:47 AM
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