B94Sport
Explorer Addict
- Joined
- November 27, 2000
- Messages
- 1,261
- Reaction score
- 0
- City, State
- Geneva, IL
- Year, Model & Trim Level
- 05 Subaru Impreza WRX STi
Recently my Ex has been having problems with a very rough idle when I first start it, along with loss of power and reduced fuel economy while driving. I have also noticed that when I stop at lights, the air/fuel mixture reads very lean... I have not experienced the howling described by others whose IAC needs cleaned or replaced, and I am thinking that the lean mixture is a fuel problem...
Anyone have any ideas as to what I should do to rectify these problems? I know that the PCV valve has AT LEAST 50,000 miles on it (possibly more)... I plan on replacing my spark plugs and wires, replacing the PCV valve, and cleaning the IAC. As for the lean mixture, I am thinking the fuel filter is the culprit (or maybe injectors), but could it be anything else? My truck has 120,000 miles on it... I have made it a habit to use fuel system cleaner every time I change my oil, and I have a superchip and run 93 octane gas, so I assume that unless an injector has failed outright, the injectors should be fine. Any help is greatly appreciated!
Anyone have any ideas as to what I should do to rectify these problems? I know that the PCV valve has AT LEAST 50,000 miles on it (possibly more)... I plan on replacing my spark plugs and wires, replacing the PCV valve, and cleaning the IAC. As for the lean mixture, I am thinking the fuel filter is the culprit (or maybe injectors), but could it be anything else? My truck has 120,000 miles on it... I have made it a habit to use fuel system cleaner every time I change my oil, and I have a superchip and run 93 octane gas, so I assume that unless an injector has failed outright, the injectors should be fine. Any help is greatly appreciated!