My
2000 Windstar with the 3.8 liter V6 would stall when idling or at
intersections. (The squealing is probably a separate problem from stalling.) It ran fine down the road, but stalled at stop lights.
The fix was to replace the Idle Air Control Valve. It is an easy to
replace item, since it is held on by two bolts right on the top of the
Air intake from the air cleaner. I tried to clean the old one, with
spray cleaner, but it only helped a little. Since stalling at an
intersection is dangerous, especially when you need to get out of the
way of oncoming traffic, I opted to just buy a new replacement valve.
You can get one from O'Reileys, Autozone, PepBoys, NAPA, et. It cost
almost $100, but how much would getting hit cost if you could not get
out of the way of oncoming traffic. Replacing it took about ten minutes.
My Windstar is now reliable when I need to blast off from a dead stop
after idling at a signal.
Here is a link to the valve that I got a NAPA just to show you what a small simple, but vital, part it is.
http://www.napaonline.com/Search/Detail.aspx?A=CRB216639_0169844105&An=599001+102000+50028+2028059
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It is both in most cases.
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