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Home >> Pontiac >> 1990 >> Trans Sport V6-191 3.1L >> Repair and Diagnosis >> Specifications >> Pressure, Vacuum and Temperature Specifications >> Compression Check
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Compression Check

Minimum, 698 kPa (100 psi) @ 200 rpm.
The lowest cylinder reading should not be less than 80% of the highest. Perform compression test with engine at normal operating temperature, spark plugs removed and throttle wide open.