Idle issues with the 351....

[nmcgrawj]

Well it doesnt happen all the time. I would say 60% of the time it idles fine. Starts up and idles great. But other times while driving it will cut off as im coming to a stop. Then when i go to start it back up it will not idle at all. Just cut right back off unless i keep it alive. And if i go somewhere, park, turn it off and come back out, sometimes it will do the same thing. And when i try to take off it bucks like crazy...then BAM it runs fine...idles fine... Its very annoying.

Anyone ever have issues like this? I tried cleaning the IAC. By the way, its a fox TB setup. It idles around 800 rpms when running the right way.

Mike(grn92lx) told me to try messing with the start up fuel tables in my PMS which i plan on doing, just wanted to see if anyone else had any tips.

 

[bjl95mustang]

Could it be a bad connection somewhere in the comp or maf? play with all of wires while it is running and see what happens.

 

[gcomfx.com]

Something simple and cheap to try:

Try spraying a mist of water around the intake area while the engine is running to see if you have a vaccum or intake leak. If it makes it die or changes the idle, you found your problem... if not, you washed you engine.

 

[nmcgrawj]

I will try those out but i think its something more. Could the IAC be bad already? I just got it this year and it has 2 months top of driving on it.