Operation CHARM
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2008
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Ranger 4WD V6-4.0L
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Tune-up and Engine Performance Checks
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Compression Check
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Specifications
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Compression Check: Specifications
Compression Pressure Limit Chart
The indicated compression pressures are considered within specification if the lowest reading cylinder is at least 75% of the highest reading.
Compression Pressure Limit Chart (Part 1):
Compression Pressure Limit Chart (Part 2):