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Home >> Ford >> 1969 >> E-100 Econoline Base, 3.9L Eng VIN A, Not Available Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Ignition System >> Tune-Up - 6 CYL >> Compression Pressure >> Notes

Compression Pressure: Notes

Check compression with throttle wide open at cranking speed. Compression pressure should be at least 75% of highest reading.

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