im lookin into buying a 93 240 hatch with an sr20 swap. i performed a compression test and cylinder 1,2, and 4 had readings around 170. but cylinder three was reading only 150. is this a major issue? i have been reading that a compression over 140 is good but a difference of 15 psi between cylinders is bad. hit me back, im looking to purchase soon.
how long has the motor been sitting?? my old car w/ an sr sat for at least 2 weeks after my accident, when it was time for it to get sold we checked the compression on it and one of the cylinder reads low. we added a little oil on it since it sat for a while and the compression went up. you should try that