How to test your compression

1. Open hood

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2. Remove engine plastics with 5mm Allen Wrench.

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3. Plastics removed

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4. Reach behind engine to unplug power steering sensor

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5. Remove the four 10mm bolts holding coils.

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6. Unplug coils

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7. Remove the two 10mm nuts holding wiring harness.

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8. Lift wiring harness out of the way.

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9. Pull all four coils.

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Coils removed exposing sparkplugs
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9.5 unplug the 4 injectors so they dont squirt.

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10. Using 5/8 spark plug socket and suitable extension (6-8 in.) remove and inspect sparkplugs. They should be a copper color like pictured.

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Image of compression tester purchased at Autozone/Pep Boys/Kragen/Napa/etc.

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11. Screw compression tester into cylinder 1 hand tight.

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12. Hold down gas and clutch at the same time, crank engine over about 6 times, until needle stops jumping on compression tester

http://www.youtube.com/watch?v=CkaUtDSdmF4

13. Record results.

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14. Release air pressure from tester and repeat for each cylinder.

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Straight from the Toyota Manual (BGB)

Compression pressure:
1ZZ-FE 1,500 kPa (15.3 kgf/cm2, 218 psi)
2ZZ-GE 1,400 kPa (14.3 kgf/cm2, 203 psi) or more
Minimum pressure:
1ZZ-FE 1,000 kPa (10.2 kgf/cm2, 145 psi)
2ZZ-GE 1,000 kPa (10.2 kgf/cm2, 145 psi)
Difference between each cylinder:
1ZZ-FE 100 kPa (1.0 kgf/cm2, 15 psi) or less
2ZZ-GE 110 kPa (1.1 kgf/cm2, 16 psi) or less

15. After test complete, put car back together in reverse order.

16. DONE! Have a beer to celebrate good results, or sulk in sorrows.

edit: this will throw a CEL for misfires. there is a fuse you can pull to prevent it but im not sure which one it is. but just unhook your negative terminal on the battery for 5 minutes and it will reset the CEL. Also the car might have a hard time starting, dont worry, just give it a few more cranks. It will start

Smaay

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