not exactly sure what to think of these results ...but if i had decide id say i got a problem.
had a hard time getting the cheap tester tube screwed in to the spark plug thread.
first test notes: went through the cylinders fast
second test notes: only did left side, got 180 instead of 150 in cylinder 5, made me think i wasnt screwin them in tight enough and started taking alot of time to ensure the tube was screwed in properly.
third test notes: screwing it in didnt make a difference, third time only did a few, did it with the throttle body open wide and used a adapter to ensure tube was properly screw on, didnt really make a difference... with throttle body or adapter
this is not the real cylinder order but this is the one im using (number 1 and 5 are the front of the engine)
motor is a 91 tpi 350 5.7l chevy motor from a firebird and i think the proper compression should be 180 psi
motor no signs of leak at all. no coolant loss, no drips on the floor. i dont drive this truck. motor oil always looks nice and clean, smells like gas though.
first test
150 [8][4] 170
150 [7][3] 150
145 [6][2] 150
150 [5][1] 180
second test
150 [8][4]
140 [7][3]
152 [6][2]
180 [5][1] 180
third test
[8][4]
[7][3]
150 [6][2]
~167 [5][1] ~167
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