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Chevrolet
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1987
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Astro Van M L4-151 2.5L
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Compression Check
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Specifications
Compression Check: Specifications
965 kPa (140 psi) @ 160 rpm.
Perform compression test with engine at normal operating temperature,
spark plugs
removed and throttle wide open.