2000 Mustang GT Idling Issues

[mf959100GT]

Hi, new here to StangBangerz, and new to Stangs! First one I've owned and have had it for 2 very fun months. But heres the bad thing, it is having really weird idling issues. To start, its completely stock except for a Cold Air Intake from americanmuscle.com, and Flowmaster Super 44's (just put on this week). So, whenever my car is cold, and it is cold out side; when ever I stop the RPM's drop to around 500, and sometimes even lower causing it to die :confused: Then it also when sitting still, like at a red light, the RPM's will fluctuate from about 500 to 1100 :confused: After my car warms up, or its warm outside it doesn't seem to do this as much. If anyone could help me I would appreciate it.


P.S. After having the exhaust put on, the guy did say that I might just have to unplug the battery for a few minutes or longer, so that the computer could "re-learn" everything, but we did this and it is still happening. :doh:

Thanks

[graysonracin]

Welcome, try cleaning your idle air control valve with some carb or brake cleaner, it should help your idiling issue.

[mf959100GT]

Have not cleaned the idle air control valve yet, going to do that this weekend...but first, where is it located at? Second, I did notice today with the weather being a little warmer it does not idle weird, only if i turn the defrost on??? Could the idle air control valve be the issue still?

[graysonracin]

Yeah sounds like thats it, its bolted on the front of the intake plenum if i remember i havent had a 4.6 car in awhile, with 2 8 millimeter bolts, or just look it up a auto zones website and see the pic then find it its right on top really or google it and theres probably thousands of things about it on there.

[91boost]

Cleaning or replacing the IAC should solve the problem.

[mf959100GT]

Thanks guys, gonna try cleaning it first this weekend, checked the price and its like $82 for the Ford OEM one, but if I don't have any luck with either way I'll give you guys another shout out

Thanks Again :bigthumb