Question about 1990 Ford F150

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My 90 ford f150 will not idel. when it starts is is about 1700rpm but the falls off.

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CHECK FOR AIR LEAKS ON THE INTAKE SIDE FIRST . THEN CHECK IDLE CONTROLL VALVE. STARTER GAS SPRAY IS AN EASY WAY TO CHECK AIR LEAKS WHIT. SPAY AROUND THE INTAKE AND IF THE RPM GOES UP OR STABLES IT AN LEAK THERE

Posted on Oct 12, 2010

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High idel ford f150 and chucks back when put in drive


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Oct 07, 2011 | 1990 Ford F150

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Some times my 1984 ford f150 idels fine when its in park(some times)but when i put it in drive or reverse idel drops about 500 or so rpm sputters for a little bit and then dies. Some times it runs fine...


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1993 f150 302 startes fine idels fine backfires when taking off


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1 Answer

Will not idel


If the motor is a 5.4L V-8, the IAC ( idle air control ) on the back of the throttle body is most likely the cause. This opens when the butterfly is shut, allowing air into the throttle body on the back.
Under the plastic throttle body cover is where it is located It is held on with 2 8mm bolt head ( maybe 9MM ? ).
6dd5fd6.jpg
Easy to get off with a bit of stretching, I cleaned mine 2 times before replacing it.
I used 90% Iso rubbing alcohol and Q-tips.
Just made sure the plunger was clean, and let it dry before reinstalling. Replacement was ~ 65.00 at an online Ford dealer selling part ( Tasca or Southwest are the ones I use )

Dec 26, 2009 | 2001 Ford F150 Styleside SuperCrew

1 Answer

Idle Screw location on 1984 Ford F150 302...


it has a metal cap on it and has to be drilled out and ajusted by a licenced mechanic if your talking about the fuel mixture for the idel it's on the cabe near the body of the carburator.

May 28, 2009 | 1984 Ford F 150

1 Answer

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It could be a idelpositioning sensor, or throttle body sensor.

Mar 06, 2009 | 1997 Ford F150 Regular Cab

1 Answer

I have ford f150 5.0 1990 truck put in 94 engine


Sounds like its Not Advancing this is Electronic and if you mix match parts this way these are the problems you run into sir I can not Advise you on a Repair or fix As it is not All STOCK FACTORY EQUIPMENT So Sorry

Jan 05, 2009 | 1990 Ford F150

1 Answer

1991 ford f150


our idle air control is lazy the round sensor with 2 wire that goes on it it on the air intake try clean the throttle body with a good air intake cleaner hope it help FIXYA OUR POST THANKS PIERRE

Jul 06, 2008 | 1991 Ford F150

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