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Subaru Impreza WRX Compression Test

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• Subaru Impreza 2000-2007 WRX and STI Maintenance and Service Instructions and Manuals

DIY Engine Compression Test!!!


Spent 45 min performing compression test with $25 compressiont tester today. Make sure to perform test when car is warm.

2002 WRX with 90k miles
Mods: VF34 @ 19psi protuned 282whp/272wtq
JDM STI TMIC
Maddad v2 DP & whisper catback
One step colder NGK platinum plugs
Stock intake with K&N panel filter
German castrol oil

1. Remove stock intake box, etc:





2. Remove 12mm bolt in order to remove coil pack from each cylinder:







3. Remove spark plugs using 5/8" long socket with an extension





4. Coil pack and spark plugs removed:



5. Pull ignition and fuel pump fuse
- Fuse remover is located next to battery:





6. Connect compression tester into each cylinder:





7. Now it's time to crank the engine with FULL wide open throttle. Crank the engine 6 times.




8. Repeat the test for each cylinder and pray numbers come out good:

References¶

http://www.clubwrx.net/forums/maintenance-service-repair/134305186-diy-engine-compression-test.html