Question about 1994 Ford Econoline

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I have a 1994little e250 with 5.8l engine that idles high al the time and it already has had a new idle motor installed

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Check the EGR valve under intake it is probly stoped up fixed mine last year was iseling at 1500 rpm till i changed lower EGR valve and cleaned out intake of carbon buildup

Posted on Nov 14, 2012

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Posted on Jan 02, 2017

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SOURCE: Idle is very very High

Check under the hood for any small vacuum hoses that are broken or disconnected. You will find a lot of small hoses! Most high idle problems are the result of a vacuum leak. Try idling the engine and spray short bursts of WD40 in different areas under the hood. If the engine idles lower when the stuff is sprayed in an area, that is more than likely where your leak is. Don't go overboard with the WD40, just short bursts.

Posted on Oct 27, 2008

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SOURCE: hesitates/stalls during acceleration

i would check fuel supply, volume adn pressure, i wold also look at the MAF sensor hot wire to see if it has a little chia pet growing on it.

Posted on Dec 13, 2008

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SOURCE: 1989 ford f350 460 gas

89 Has EFI not carb. I vote to give you a ZERO!! The problem is more likely the IDLE AIR CONTROL VALVE (no sh!@#) "IDLE"????

Posted on Feb 04, 2009

  • 94 Answers

SOURCE: engine codes p1133 p0171 p0507 p0131 all at once

throttle position sensor

Posted on Mar 10, 2009

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SOURCE: idles too high.

most likely a sticking idle air control motor.It is the round log solenoid bolted on the side of the throttle body. Try tapping it with a hammer first to see if this un-sticks it. If so this is your problem and replace it.

Posted on Mar 16, 2009

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Car won't stay running, starts up and then just dies off like it never had a Chance of staying idle.

Hi Johnny, Im AL the owner of Big As Auto Repair.

Johnny, here's something I want you to try. I want you to start the engine while giving it a little gas, not much, just enough to see if it will idle. If it does Idle and stays running with your foot on the gas and dies when you remove your foot. Then go and buy an 'IDLE AIR CONTROL MOTOR" It mounts on the throttle body. Put that on, there are only two screws that holds it on, very easy to replace. After installing it the idle will be real high, this is normal, just wait it will stabilize and idle normal. NOTE: if it still dies even with your foot on the gas, then you have another issue but this is a good place to start. Hope this helps and please visit my auto-repair-website at:

Nov 28, 2015 | Cars & Trucks

1 Answer

My van is idle high i cleaned the throttle boady and it idle down the a few hours later its high idle again why i replaced two sensor and still idle high

Hi Alexandra, Im AL the owner of Big As Auto Repair

There are several things that can cause high idle, but the 2 most common problems are as follows.

(1) You could have a vacuum leak somewhere on the engine. Here is how to check for that issue. Here's what I want you to do: Buy a can of CARB Cleaner and while the engine is running spray around the Intake Manifold, the manifold is the thing the throttle body sit on. Also spray around all the vacuum line as well. If while spraying there is a change in the idle speed then you have found your leak. If there is no change then move on to step 2.

(2) Sometimes when you have a high mileage vehicle parts begin to ware out or can also begin to stick in place. Here something you can check. Idle Air Control Motors can start sticking from corrosion build up and can cause a high idle issue. Here what I want you to do. Start the engine and let it idle, while its idling I want you to tap on the Idle Air Control Motor If it idles down to normal idle speed replace the motor. The motor mounts onto the throttle body and most of them are round. Once you replace it and start the engine you'll notice that its idling real high, :This Is Normal, just let it idle until the engine controller resets the idle speed to normal.

Hope this helps and should you need further help please visit my auto repair website.

May 25, 2015 | Cars & Trucks

1 Answer

Just replaced my idel air controle moter and its already broke

Those generally don\'t "break". What usually happens is the get a piece of carbon or a small chunk soot that sticks to the shaft and causes the idle control motor to stick in a partially open position. Take it back off and clean it and re-install it. It will also take the computer a few minutes to reset the engine idle once the new idle motor is installed.

Apr 25, 2014 | 1996 Dodge Ram 1500 Club Cab

1 Answer

2004 buick rendezvous cold start dies in winter

Hi Al, I'm glad to help!

Al, sense I'm not there to actually do diagnostics on your problem, I'll just tell you what I have found most of the time with your dyeing issue. Being in the automotive field for over 40 years I have mostly found a cold start dyeing issue to be the "IDLE AIR CONTROL MOTOR" because what it does is idles the engine up during cold starts and also when there is a load applied to the engine like when the A/C compressor turns on. This is where I would start. Hope this helps and have an awesome day Al.

Feb 13, 2014 | 2004 Buick Rendezvous

1 Answer

Extreme high idle have ck for vac leaks replaced throttle body and replaced egr componet lost what could it be

What is the mileage on this vehicle? The most common cause of high idle on cars with over 80,000 miles on them is a sludged IAC [idle air control] motor. This device is controlled by the engine's computer. It acts as a computer controlled vacuum leak to keep the idle speed up when you put the car in gear, turn on the A/C or put any load on the idling engine.
These items get sludged up [usually because you are not changing your motor oil often enough] and will stick open. This causes the fast idle. First step is to remove the IAC and clean it out with carburetor cleaner [aerosol type]. Reinstall the IAC [using a new gasket] and see if that helps. Sometimes, the IAC can not be cleaned, or the cleaning procedure works for a limited time [days or weeks] In these cases, a new IAC must be installed. I hope this helps.

Aug 19, 2011 | 1994 Toyota 4Runner

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