SL L4-1.9L SOHC VIN 8 (1997)
Compression Check: Testing and Inspection
WARNING: Compression checks must be performed with the vehicle in park or neutral and parking brake applied.
1. Start the engine and allow it to reach normal operating temperature.
2. Shut engine off and disconnect the ignition module wiring harness plug.
3. Disconnect spark plug wires and remove all four spark plugs.
4. Insert a compression gauge bar kit into the spark plug hole.
5. Fully open throttle.
NOTE: Always use a fully charged battery to obtain engine revolutions of 250 rpm minimum. Do not crank the engine for more than 15 seconds.
6. While cranking engine, measure compression. The cylinder should puff or compression gauge needle should bounce a minimum of 10 times.
NOTE: All measurements must be completed in as short a time as possible. Check low cylinders and make sure a minimum of 10 puffs are
