It doesn't idle very good after it warms up, I've had it on the computer and it pulls no codes. I cleaned the throttle body and it idled fine for about a week, then started doing it again, so I cleaned it again....same thing... any help is appreciated

93 300 I
4x4 5spd

 

Might need an IAC valve

-Jon

 

Mine does the same thing, I was told I needed a new throttle body I'm not convinced thats the case yet though

 

Possibly a faulty fuel pressure regulator?

 

where is the fuel pressure regulator? would it pull a code if it was bad? and how much does something like that run? I hate to just start changing out stuff (ie. engine control temperature sensor, O2 sensor etc.) those are two things I've thought of, I put new plugs, wires, cap, rotor, fuel filter, air filter etc. on it and it still runs like crap pretty much, horrible fuel mileage too.

 

A component like an iac or o2 sensor can be going bad and causing a problem and still not be recognized by the computer as bad. In the service manual is recommeded ranges and proceedures to test o2 sensors and stuff. I've done a little of it myself and its not very hard, just a little aggrivatin somtimes