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Compression DROPPING!?!?

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Old 05-15-2004, 11:33 AM
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Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
Compression DROPPING!?!?

i searched around and couldnt find anything else like this, but i did a compresion test on only the cylinder closest to the front of the car on the drivers side and got a reading of about 145 but it was steadily dropping!!! it didnt stay but fell and fell.....is it supposed to do this, i not what may be my problem?
Old 05-15-2004, 12:57 PM
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ede
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check valve in your gauge isn't working
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