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90 town car 302i replaced spark plugs spark plug wires fuel fillter rotor and cap engine still misses?
Wiki User
∙ 18y ago
Time for a compression test. Mark the spark plug wires so that you'll know where to put them back. Pull all plugs, screw in a compression gauge and have an assistant crank the engine with the accellerator full open. Let the engine crank until you hear the compression hit the gauge at least 3 times, then stop and look at the pressure reading on the gauge. Record the reading for each gauge. If one or more gauge is significantly below the others, you probably have a burned exhaust valve, the most common cause of low compression in one cylinder.
Wiki User
∙ 18y ago
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