OEM idle air control valve

[1990LTD]

I would like a junkyard Ford/Motorcraft IAC, I cannot find any in yards around here. We don't have the type of yards where you go in and wander around to look for stuff, either.

Needs to fit the HO or lopo throttle body...dunno if the exploder ones are the same or not but if they are I'll take one of those too. You guys probably know better than I on which cars these particular valve can be found.


My IAC is wonky and everyone has had the best luck with junkyard cleaned up oem replacements vs 90 dollar oem replacements, and folks (myself included) have gotten bum valves right out of the box.


to anyone willing: How much would one cost from a junkyard near you? Based on that I'll get you to grab one or two maybe just in case and I'll give you a couple of bucks for your time. I'll pay shipping too, obviously. If you wanted to test the IAC on your car I wouldn't hold it against you.



If you wanted to pocket a MAP sensor while you were there I wouldn't tell on you. Where that sensor ended up would be your decision - maybe you'd put it in a box with some parts you just got and send them to somebody. maybe? we'll see.

[1990LTD]

FORD BRONCO (1986 - 1989)
FORD BRONCO II (1988 - 1990)
FORD COUNTRY SQUIRE (1987 - 1991)
FORD COUNTRY SQUIRE LX (1987 - 1991)
FORD CROWN VICTORIA (1989 - 1991)
FORD CROWN VICTORIA LX (1989 - 1991)
FORD CROWN VICTORIA S (1989 - 1991)
FORD E-150 ECONOLINE (1987 - 1989)
FORD E-150 ECONOLINE CLUB WAGON (1987 - 1989)
FORD E-150 ECONOLINE SUPER (1987 - 1989)
FORD E-250 ECONOLINE (1987 - 1989)
FORD E-250 ECONOLINE CLUB WAGON (1987 - 1991)
FORD E-250 ECONOLINE SUPER (1987 - 1989)
FORD E-350 ECONOLINE (1987 - 1992)
FORD E-350 ECONOLINE HD CLUB WAGON 1992
FORD E-350 ECONOLINE SUPER (1987 - 1992)
FORD E-350 ECONOLINE SUPER WAGON (1987 - 1992)
FORD ESCORT GL 1987
FORD ESCORT GT (1986 - 1987)
FORD ESCORT L 1986
FORD ESCORT LX 1986
FORD ESCORT PONY 1987
FORD F SUPER DUTY 1988
FORD F-150 (1986 - 1989)
FORD F-150 SUPER CAB (1986 - 1989)
FORD F-250 (1986 - 1992)
FORD F-250 SUPER CAB (1987 - 1992)
FORD F-350 (1987 - 1992)
FORD F-350 SUPER CAB (1988 - 1992)
FORD F-450 SUPER DUTY (1990 - 1992)
FORD LTD COUNTRY SQUIRE 1986
FORD LTD CROWN VICTORIA (1986 - 1988)
FORD LTD CROWN VICTORIA LX (1987 - 1988)
FORD LTD CROWN VICTORIA S (1987 - 1988)
FORD MUSTANG LX (1987 - 1990)
FORD RANGER (1988 - 1992)
FORD RANGER SUPER (1988 - 1992)
FORD TAURUS 1986
FORD TAURUS GL (1987 - 1988)
FORD TAURUS L (1987 - 1988)
FORD TAURUS LX (1987 - 1988)
FORD TAURUS SHO (1989 - 1995)
FORD TEMPO (1987 - 1991)
FORD TEMPO GL (1987 - 1991)
FORD TEMPO GLS 1991
FORD TEMPO L (1987 - 1991)
FORD TEMPO LX (1987 - 1991)
FORD TEMPO SPORT (1987 - 1990)
LINCOLN CONTINENTAL 1988
LINCOLN CONTINENTAL SIGNATURE 1988
LINCOLN TOWN CAR (1989 - 1990)
LINCOLN TOWN CAR CARTIER (1989 - 1990)
LINCOLN TOWN CAR SIGNATURE (1989 - 1990)
LINCOLN TOWN CAR SIGNATURE SE 1989
MERCURY COUGAR LS 1988
MERCURY GRAND MARQUIS (1986 - 1991)
MERCURY GRAND MARQUIS COLONY PARK 1986
MERCURY LYNX (1986 - 1987)
MERCURY LYNX XR3 (1986 - 1987)
MERCURY SABLE (1986 - 1988)
MERCURY TOPAZ (1987 - 1991)
MERCURY TRACER 1991

wow

[rick99601]

if its not more convenient for someone else ill get one out to you in about a week.


if all goes according to plan ill be at skippyville/enroute most of this week. im picking up the lincoln from maryland then heading there.

[1990LTD]

cool man thanks. let me know how much $$ you want for your troubles!

[Lincolnmania]

ez pull isnt too far away mang......it's just damm cold lol......i might have some on the shelf, dont remember what i have left, every time i tell someone yea i have one, i go for it and it's gone

[1990LTD]

cool! if you have one that would be sweet. also if you make a trip to ez pull that would be great too.....don't go out of your way to do it though, winter sucks

[1990LTD]

cock sucking fucking ebay. got out bid on one at the last minute, it was only like 9 bucks.

i'll take any/all IAC valves you guys got

[zoomie]

i think i still have one offf a mark VII you can have it for cost of shipping mang!, i was going to use it , but i ended up finding a nice new one at my local yard.

[GoodSamaritan]

They are easy to test, just get a pair of alligator clips and hook to the two terminals on it for a sec or so. (not sure what voltage it runs on as it is controlled by the ecm, so don't leave it hooked up for long. It should make a faint click and you'll see the little rod inside it move.

If it doesn't try taking the screws out that hold the two halves together, and clean the snot out of everything with carb cleaner.
Put a few drops of 3in1 or similar(wd40 is a terrible lubricant) in the hole on the half with the electrical connection. Also lubricate the little shaft on the opposite end, where it slides back and forth in the housing. When every thing is moving free and clear, put it back together and try testing it with 12v again.

I haven't found one I couldn't resurrect this way. Of course, that's assuming you can get the screws out of it to get it into two halves. If you can't and it's a junkyard piece. use a dremel to cut the heads off, and then use vice grips to get the rest of the screws out. Failing that, break them off and then drill them out. Time consuming, but cheap.

[1990LTD]

I've cleaned the ports of the one on my car but never did take it apart and lubricate any parts. Cleaning it helped for a bit.

It works but the idle isn't right..it fluctuates, but nearly everything else that could screw with it is fine. No vac leaks, fuel problems, sensor issues, anything I can think of.

I'll do that to any of the ones I get before I try them out on the car.

[GoodSamaritan]

The thing to remember is that the IAC on these cars isn't a linear adjustment. There isn't a motor or anything that adjusts the air flow. It's a solenoid. It's either open or closed. The computer pulses it just like an injector, albeit more slowly.
If the IAC is dirty there is friction that keeps that little rod from going back and forth quickly. If it doesn't move as it should the ecm usually overcompensates and you get a wandering idle.

[1990LTD]

oh, interesting. I didn't know it was just an on/off, I assumed it metered airflow


Do you think I could try and fix a new one I got that was bad right out of the box?

[zoomie]

oh, interesting. I didn't know it was just an on/off, I assumed it metered airflow


Do you think I could try and fix a new one I got that was bad right out of the box?

you might try adjusting the idle air screw up a little bit, i had to do that toget mine to run correctly

[86VickyLX]

For the record, the IAC uses 12 volts to operate.
You checked your timing and verified at base (spout unplugged) it's at 10*btdc?
You set the idle, with the IAC disconnected, between 650 and 750rpm?
After setting the idle, with the IAC disconnected, you set the TPS to read a voltage of .7-.9 volts?

[1990LTD]

For the record, the IAC uses 12 volts to operate.
You checked your timing and verified at base (spout unplugged) it's at 10*btdc?
You set the idle, with the IAC disconnected, between 650 and 750rpm?
After setting the idle, with the IAC disconnected, you set the TPS to read a voltage of .7-.9 volts?

yep, nope, nope