I have a 1998 Chevy Malibu, and man has it got problems.
Lets start first by Engine Code PO172 - What exactly does "System too Rich" mean? So... being the shadetree mechanic that I am...I replaced the IAC Valve, TPS Sensor, Bank-1 O2 Sensor, and cleaned the MAF Sensor with MAF Sensor cleaner. There are relatively new wires and plugs and New Air Filter. I ran Lucas Fuel Injector Cleaner through a tankful of Gas. I tried everything fuel related as a sensor would fix (I think) except replace the MAF Sensor itself, and the Bank 2-Rear O2 Sensor. The Car still runs like crap. It revs at start up and sometimes while it's stop at red lights. The only code that keeps popping up is the PO172-System too rich.
Problem (2): The car is losing Anti-Freeze. I already replaced the intake manifold gasket -Twice- I might add (It's not leaking). I replaced the Anti-Freeze tank and water pump- still losing water. Anybody had this problem?
Can somebody Help ?
Scott E Dawg