hi, today i did a compresion test in the 1991 honda civic DX for my son since my uncle give it to him, but i forgot to lock the throttle wide open and i got theses reading, how much diferent between the throttle open an d closed, thank you
1 cylinder 200 psi, at the first crank 150 psi
2 cylinder 180 psi, at the first crack 110 psi
3 cylinder 205 psi, at the first crank 110 psi
4 cylinder 215 psi, at the first crank 115 psi

so what do you think?

 

You'll get random numbers with the throttle closed. RUn the test again with the throttle wide open and you'll see much more consistent results

 

i will tomorrow, but are thoses number tell youanything regarding the engine

 

They won't tell me anything because the test was not run properly.