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compression test

  1. Compression Readings

    Care, Maintenance, and Troubleshooting
    Hey everyone, sorry for posting a redundant topic but I'm confused about the compression levels and methods of performing a compression test on the 1zz. I read some folks say to take a reading with throttle open, some say it doesn't matter. I tested both ways with a cold engine, dry cylinders, 5...
  2. Bad Compression Test Results...Plus a Brand New CEL

    Care, Maintenance, and Troubleshooting
    Ok, so I read the how-to on compression testing, along with my tester manual. I tried both cold test and after engine warmed up. Readings were (psi) #1 - 130 #2 - 132 #3 - 118 #4 - 134 After the first attempt (I only tried cylinders 1 and 2, freaked when I saw the low readings, then read that...
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