IAC problem?

[sparkyputerguy]

Good morning, ladies and gents!

I've searched the board and I'm pretty sure the IAC needs to be replaced but wanted to run the symptoms by the gurus first...

The X is a '00 XLT with the 4.0 OHV engine. Approx 49K miles.

This only happens every once in a while, and especially when it's humid out. Probably around 98% today...

I crank the engine, it fires up, and then idles really low and rough until it dies. If I tap on the gas a little bit and take it up to around 500-750 RPM it's perfectly normal.

Once I got out of the driveway and onto the street, I could accelerate with no problem- everything was smooth. But if I stopped at a light/stop sign idle would drop down to around 250RPM and stall. So I had to run a few stop signs this morning...

I've cleaned the IAC a couple of times as it was doing the "howling" thing this past winter. Could it finally be past the point of cleaning?

Just wanted some confirmation before I went out to buy the part.

Thanks, and have a great day!

 

[Lifted95X]

Replace it and it should fix your problem.

 

[sparkyputerguy]

I think that will definitely do the trick.

I hobbled up to the Ford dealership at lunch to pick up the part... And the truck was still misbehaving.

I left my tools at home (first mistake) so I grabbed a pair of pliers and a piece 'o s&*t vise-grips out of the toolbox from our office with the intent to change it out in the parking lot at Ford.

Well, the vise-grips didn't do the trick, so instead, I tapped on the IAC as the 4-letter words were flowing. Closed the hood and wouldn't you know it!?!? It started up wonderfully!

I think I'll make it home to change it tonight. But today taught me some things:

1. Never leave your tools at home
2. Never... EVER... trust tools made in China