Villager V6-181 3.0L SOHC VIN 1 EFI (1997)
Compression Check: Testing and Inspection
Gauge Check
Before performing the compression test, check the battery. The battery must be fully charged, in good condition, and properly connected. If the battery is
not fully charged, recharge or replace it.
1. Run the engine until normal operating temperature is reached.
2. Turn the ignition switch OFF.
3. Release the fuel pressure using the following procedure:
a. Remove the 15A fuel pump fuse from the interior fuse junction panel.
b. Start the engine and allow the engine to idle.
c. Let the engine stall, and crank the engine three more times to ensure fuel is out of the system.
d. Turn the ignition switch OFF.
4. Remove the spark plugs.
5. Disconnect the electrical connector from the ignition coil.
6. Install Rotunda Quick Disconnect Compression Tester 134-R0212 or equivalent tightly into the spark plug hole.
7. Depress and hold the accelerator to wide open throttle (WOT) and crank the engine.
8. Normally, the first compression stroke will run the gauge indicator needle a considerable distance up the scale. Succeeding strokes will raise it
more until the highest level is shown (this will require approximately four to five compression strokes). Record the highest reading.
9. Repeat steps 6-8 for each cylinder and compare the readings. See: Test Results
