Required tools
Basic tool set
Spark plug socket
Shop manual
Compression gauge (screw-in type)A screw-in tester is preferred over the less expensive push-in tester.The compression test
To get accurate results from a compression test, a compression gauge
of good quality is required. A screw-in gauge is preferred over cheap
gauges with a rubber friction cone that pushes into the spark plug hole.
An assistant with a pencil and pad of paper is also helpful.
Start the engine and run it up to operating temperature. If the vehicle
has been sitting for a long period of time, it should be run for about a