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Home >> Plymouth >> 1987 >> Horizon Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - 4-CYL >> Testing >> Engine Compression

Engine Compression

Before making a compression test or cranking engine with a remote starting switch, remove coil wire from distributor and attach to ground. Check compression pressure with engine warm, spark plugs removed, and throttle valve wide open.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
2.2L 2-Bbl. 9.5:1
2.2L EFI 9.5:1
2.2L EFI Turbo 8.1:1
2.5L EFI 9.0:1
Compression Pressure 2.2L & 2.5L) Minimum 100 psi (7 kg/cm2 )
Maximum Cylinder Variation (2.2L & 2.5L) 25 psi (1.7 kg/cm2 )