idling problem

[blue94sho]

my 94 will run but after a couple mins. it will start idling up and down and almost shut off people are saying the air idle control valve if anyone knows please let me know thanks.

 

[msteiny]

Clean your MAF and reset your idle. If that doesnt work then go after the idle control valve.

 

[riden2low]

Mine does it on a 95ATX. The idle does it up and down thing when the A/C kicks on to pull the moisture out of the inside air. Turn the heating controls to off and it stops but the idle is still low. I have replaced the IAC, cleaned everything, checked for vacuum leaks, did the idle reset and still having the same problem. You might want to try cleaning the IAC and the MAF and etc. Hope you have better luck than I have had. I have been watching every thread that pops up about the idle and maybe someone will have hit on something that I have missed. Just drives me nuts.

 

[itwonder]

Make sure the clamps on the hoses between the MF and the TB are all tight. If you have EGR, check for a sticking EGR valve.

 

[blue94sho]

i think i might have fixed it i had to put 2 different IAC's on it idling still drops a little low after putting gas to it im gonna change the fuel filter on it to. but other than that she runs like a dream. thanks for everyone' s help

 

[itwonder]

Something else you should check is what Ford calls the base idle adjustment. It is the adjustment of the little screw on the throttle body that sets how far the throttle plate is allowed to close. Sometimes clueless mechanics will mess with that thinking it is the idle adjustment. If set improperly, the PCM will have a tough time making it idle. The adjustment procedure is in the FSM. If you want to just try something quickly, try adjusting it to open the throttle plate by 1/8-1/4 turn. No more. Remember where it was so you can move it back if necessary.