Q: If tdc is on exhaust stroke will it have 10psi on cylinder 1
The car shakes and runs rough on idle and seems like it wants to stall there was 10 psi reading on cylinder number one with a compression tester
Most engines will need at least a minimum of 100 psi per cylinder in order to run. In addition, for the motor to run efficiently, this also requires a variance of less than 10% from cylinder to cylinder on this reading. If you have a reading of 10% in one cylinder, this suggests you may have some serious damage to that piston of the compression rings for that cylinder may have collapsed resulting in that low compression reading.
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