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Engine Compression

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Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open. The DME master relay and/or fuel pump relay MUST be pulled out for compression test. See ON-VEHICLE ADJUSTMENTS article for additional information.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Pressure
6-Cylinder & V8 142-156 psi (10-11 kg/cm2 )
V12 156 psi (11 kg/cm2 )