mnguy

hey i just did a compression test on my car.
i live in minnesota and its starting to get chilly here,
around 45 degrees i think.
last time i drove the car was yesterday afternoon around 4:30pm.
its 10:30am now today.
i just did a compression test, the motor was cold obviously from the weather AND sitting all night.
i was just wondering would that cause the compression test to read higher than normal?

and also whats the ideal conditions to get a proper reading for compression.

rx-7 obsessed

cold will raise compression a little test it warm with the throttle wide open

K-Tune

iTrader: (26)

you want the motor close to operating temperatures for the compression test. also be sure you are holding the throttle all the way open while turning it over.