SOURCE: idles high
Zab, First things first, check for any vacuum leaks, hoses that are disconnected, cracked or just plain worn out. Also check for vacuum leaks around the throttle body.
It really sounds like you have an EGR valve that is stuck open ever so slightly. The MAP sensor is a result of a low manifold vacuum. The IAC (idle air control) motor is trying to compesate and keep the engine running resulting in the high idle speed. I would remove the EGR valve and clean it gently with a brush and pick to remove any carbon build up.
Let me know, regards.
SOURCE: I have a 2003 Saturn
Well i can explain this and hopefully it helps solve some ideas, my brothers saturn has a system that works like a traction control and it applies the brake to either front wheel when the oposite wheel is spinning or slipping. so there is a sensor that detects the wheels loss of traction and it sends a message to computer that tells the other brake to apply. so if you can find out what controls this applying of brakes i bet you will fix this problem and i'm very sorry i cant help any more than this. but ask alot of questions and go to some shops and ask questions, this is also how you meet new people with experience for future problems.
SOURCE: I have a 2006 saturn
sounds like your AC compressor is trying to lock up. Have a shop check the head pressure on the compressor.
SOURCE: p2431 saturn ion
Why would you change fuel injectors?
Mail them away to be ultra sonic cleaned & tested only,
expensive proposition that was!
The MAP Sensor failed a test also?
I googled the P2431 & seems like a Secondary Air Injection
System Pressure Sensor ,hopefully that will get you close
Google it-- not easy to find some of those codes
Codes come back because you haven't found the fault
that set the code.
You working on things from yester year --not todays techology
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