Quote:
Originally Posted by davedadude
Its been a few months, but here is the latest update:
Replaced the MAF and the air/fuel sensor and the car ran much better but only a couple of days. After a complete diagnostic, it has low compression on cylinder 1. Not what I wanted to hear.
Cyl 1 - 120psi
Cyl 2 - 170psi
Cyl 3 - 160psi
Cyl 4 - 175psi
Registration is due in a few weeks and it wont pass smog until this has been fixed.
Any help/suggestion on next steps are greatly appreciated.
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I was down to 90 PSI in a cylinder and mine never died. Loss of compression doesn't mean loss of engine function, just power as it doesn't push the crankshaft as forcefully and equally as the other pistons. Although you found
an issue, it's not
the issue, if that makes sense.
I replaced my IAC valve chasing a stall at idle that made it almost undriveable and it improved it but ultimately it was the TPS that failed with no code. You still have the P0171 code though or did that change? In case you are thinking it, 120 PSI does not trigger a P0171. You'd have to have a hole in your intake valves in order to get a lean code and near 0 PSI.
