Moddiction

^Nope. Did my compression at over 140K and mine is 225 on all 4 cylinders.

OP was the engine warm and was the test done WOT?

Consistency is the number 1 thing to look for! So they are all within spec. Could be the gauge reading low, on a cold engine without going WOT during the test etc. Numbers are definitely low over all but might not be an indication of wear just the gauge etc.

unclejemima

Is there a spec for a new motor PSI? They spec a low, but what is the "normal" spec? Seems odd they would allow anywhere between 128 and 240 to be normal. That sounds like a pretty large gap to me.

Thanks,

Moddiction

Think brand new motors usually show about 240 psi across the board for AP1's.

unclejemima

So would you guys get them to re-test it, or should I be happy with the numbers? Seems no one else had those low numbers, but most are saying that its just the consistency that I should look for.

Should an AP1 with that low miles have 100% equal compression between cylinders, or is it 100% normal to be off by 5psi?

I'm going to go make a deal with the dealership today, just wanted to hear back from you guys before I do.

Thanks,

Carbon Blue

you are fine, it is consistency that you want. They are on the low side but id rather have your numbers as opposed to 220 200, 160, 220.

importkid

I did my compression test without removing the fuel pump fuse. Threw similar numbers. After removing it I was in the 230s across the board.

ahrmike

possibly not holding throttle open or not properly warmed up?