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Home >> Ford >> 1984 >> Bronco II Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - V6 >> Testing >> Engine Compression

Engine Compression

Test compression with spark plugs removed, engine at normal operating temperature and throttle wide open. Crank engine through at least 5 compression strokes before recording reading.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
2.8L 8.7:1
2.9L 9.0:1
3.0L 9.3:1
Max. Variation Between Cylinders Less than 25%