x wont idle

[EMG7895]

got a 93 with 99xxxmiles on it and when it has rained recently (within 24 hrs) when you start is it runs fine for a second and then the rpms drop low and it dies so you have to keep the rpms up or it dies but once its been running for 4 or 5 minutes it runs fine. i have already cleaned the iac and maf any other suggestions.

 

[Willet]

Even though you cleaned it, it may be time for a new IAC. Does it run rough when you keep your foot on the gas?

 

[EMG7895]

it runs fine when you put your foot on the gas

 

[BradE.]

Replace the IAC.

 

[Opera House]

If you have more time than money

This could be a failed IAC but it could be other things. One way to test is to stick a pin in the white wire at the IAC and connect that to ground through a small12V lamp. That might get the rpm up. With your story about the rain, I suspect an electrical connection problem. Check the connector on the computer. Does it really run well with your foot on the gas? This could even be a spark plug wire problem. I assume you have tried cleaning the IAC.

 

[EMG7895]

i have cleaned the iac and the problem also seems to happen when it is cold and it runs fine when you keep your foot on the gas

 

[Alec]

Been said above: a clean, bad IAC is still a bad IAC.

However, you could have a vacuum leak; the intake manifold bolts are commonly loose or the gaskets blow out.

 

[EMG7895]

thanks for the help, i think ill replace the iac does anybody know how much they go for

 

[Alec]

About $70-80. If you want to get it online, www.fordpartsnetwork.com