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Home >> Plymouth >> 1984 >> Conquest Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - 4-CYL >> Testing >> Engine Compression

Engine Compression

Check compression pressure with engine at normal operating temperature, choke and throttle valves wide open and engine at cranking speed (250 RPM). Crank engine at least 6 "puffs" per cylinder to determine engine compression.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
1.4L 8.8:1
1.6L & 2.0L 8.5:1
1.6L Turbo 7.6:1
2.6L 8.2:1
2.6L Turbo 7.0:1
Compression Pressure 149 psi (10.5 kg/cm2 )
Maximum Variation Between Cylinders 10%