R 3500 P/U 2WD V8-454 7.4L VIN W 4-bbl (1988)
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Compression Check: Specifications
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.