In your previous post you mentioned that you dont have the moosing anymore since you replaced the IAC valve. What problems are you still having? A car with 50,000k should not have needed an IAC valve, a cleaning would have solved your problem. If your still having idle problems you should try the
Throttle Hang fix I doubt a fuel pump or filter problem...but a filter is a cheap try anyway.People can only give you advice on a solid description of your problem, nobody is going to be able to tell you the exact problem...so all you will get is good advice from some good people...dont get upset...just give the best clear description of your problem, and hope that someone comes up with the likely cause based on our own experiences.