i'd have to say the tps or iac valve, the tps should be as close to .90 as you can get it

 

I agree

 

TPS, Throttle Position Sensor? What's the IAC Valve?? Intake Air?

 

Idle air control motor. Its usually on the air intake hose from the air filter close to the throttle body, but on 5.0's I think its actually on the throttle body itself. Usually when you have an idle looping problem on a 5.0, its usually the TPS, IAC, or vacuume leak.

 

Yea, it's on the side of the TB.

 

Adjusted the TPS to .90, cleaned the two wires on the MAF sensor and flushed the radiator. Also cleaned the IAC motor. Same ole problem!!! Tried to clean the o2 sensor's but don't have the right tool... Any other idea's?

 

I think ive found the problem...........


ITS A FORD!!!!!

Jus joking.

Does it do this when you first start it up or all the time? My car demands that she be warmed up before I go anywhere.

 

No only when it warms up! Weird huh!!! I can't figure this thing out for the life of me...

 

Ok just got it back from firestone and they said that they could'nt run a diagnostic on it either! All the codes they got are things i've already replaced... The Ford dealer says so sorry but the car is over 8yrs old and there's nothing we can do for you! So i'm back to square one! What the HELL could it be???

 

are your converters clogged? do they turn red or smell at all? might try and unplug your o2's to see what happens. you can also buy a pressurized fuel system cleaner thats easy to use, might be the injectors