compression test instructions needed

1994 SUBARU IMPREZA
20,000 MILES • 1.8L • 4 CYL • AWD • AUTOMATIC
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STEPHEN MARTINEZ JR
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  • 1 POST
What is the proper compression rating when doing a compression test?
Dec 17, 2016 at 6:16 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
all cylinders should be within twenty percent of each other compression varies due to compression ratio but you need at least ninety psi to run right on all cylinders.
Dec 17, 2016 at 8:01 AM
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