Question about 2003 Ford Expedition

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I replaced the idle air control valve on my 2003 Ford Expedition, 2wd 4.6L, and disconnected the battery to reset the computer,but now the engine idles high around 1000-1200 rpm's and it will fluctuate up and down to around 500-600 rpm's, what could cause this?

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Hi there
re disconnect the battery wait ten seconds reconnect and then when you start the vehicle hold accelorator at the rpm you want it to be at you have to do this to reset the idle simple fix no worries hope this helps you have a wonderful day

Posted on Aug 23, 2011

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1 Answer

Car engine idles really high then really low, why?


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------

Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

------------

1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------

Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

-----------

GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------

1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

------------

Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-----------

Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

---------

High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

--------

High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-------

Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

----------

Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

-----------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Feb 15, 2013 | 2003 Pontiac Grand Am

1 Answer

2003 spacewagon wont idle when engine is cold


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------

Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

------------

1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------

Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

-----------

GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------

1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

------------

Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-----------

Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

---------

High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

--------

High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-------

Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

----------

Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

-----------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Dec 06, 2012 | Cars & Trucks

1 Answer

Car stalling when slowing down


This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control


Oct 14, 2012 | 1997 Ford Expedition

1 Answer

After sitting, hard to start, seems not to be getting fuel. you can spray starting fluid and it starts, must run at higher than normal idle for a few minutes, then will idle normally.


OPERATION The Idle Air Control (IAC) valve controls the engine idle speed and dashpot functions. The valve is located on the throttle body on. This valve allows air to bypass the throttle plate. The amount of air is determined by the Powertrain Control Module (PCM) and controlled by a duty cycle signal. Fig. 1: Cleanable IAC valve — 5.0L engine version shown, others similar 88484g22.gif
Fig. 2: Non-cleanable IAC valve — 5.0L engine version shown, others similar 88484g23.gif
prev.gif next.gif TESTING OBD-I System
  1. Make sure the ignition key is OFF.
  2. Disconnect the air control valve.
  3. Use an ohmmeter to measure the resistance between the terminals of the valve solenoid. NOTE: Due to the diode in the solenoid, place the ohmmeter positive lead on the VPWR pin and the negative lead on the ISC pin.
  4. If the resistance is not 7–13 ohms, replace the air control valve.
---
REMOVAL & INSTALLATION Fig. 1: Idle air control valve mounting — 4.9L engine version shown, others similar 88484g10.gif
  1. Disconnect the negative battery cable.
  2. Disconnect the engine wiring to the IAC sensor.
  3. Remove the two retaining screws for the valve.
  4. Remove the IAC valve and discard of the old gasket. Fig. 2: Disengage the idle air control solenoid electrical connection 88485p12.jpg
    Fig. 3: Loosen the idle control solenoid retaining screws 88484p08.jpg
    Fig. 4: Remove the idle air control solenoid from the throttle body 88484p09.jpg
    To install:
  5. Clean the area of old gasket material.
  6. Using a new gasket, attach the IAC valve to the engine. Tighten the retaining screws to 71–102 inch lbs. (8–12 Nm).
  7. Connect the IAC valve wiring to the unit.
  8. Connect the negative battery cable.
prev.gif next.gif

Aug 01, 2010 | 1990 Ford Econoline

1 Answer

3.2 liter yamaha engine manual IAC valve How do I replace the IAC valve on this engine? Steps? I just bought a new one and I need to get it replaced. FORD 1994 Taurus SHO 3.2 liter engine YAMAHA


may just need cleaning with carb cleaner.

here is 1996, oldest I have:

Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Idle Air Control (IAC) Valve Removal
  1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
  1. Disconnect the engine control sensor wiring (12A581) from the idle air control valve (IAC valve) (9F715) at the idle air control valve electrical connector.
  1. Remove the two idle air control valve retaining bolts.
  1. Remove the idle air control valve and idle air control valve gasket.
Installation
  1. NOTE: If scraping is necessary, be careful not to damage idle air control valve gasket surfaces, or drop material into intake manifold (9424) or throttle body (9E926) (depending upon application).

    Clean idle air control valve gasket mating surfaces.
  1. To install idle air control valve, reverse Removal procedure.
  1. Tighten the idle air control valve retaining bolts to 8-12 Nm (71-106 lb-in).
33b4417.gif

Jan 14, 2010 | 1994 Ford Taurus

2 Answers

My 2003 expedition is idleing and running rough


Its recommended to replace all coils at the same time you replace the plugs. I had the same problem @62000miles, changed the same part, including injectors at the ford dealer. It just got worst, I replaced all the coils and engine ran like new.

Aug 10, 2009 | 2003 Ford Expedition

1 Answer

My 2003 Ford Expedition revs high when I go over 50mph. What's up?


Change idle air control valve located at rear of engine.

Jul 17, 2009 | 2003 Ford Expedition

2 Answers

Idle air bypass vaule


The Idle air control valve (IAC) is on the back of the throttle body housing on the 4.6 V8, it's half the size of a can of Red Bull. Try tapping on it with a small hammer and if the truck clears up then it's time to replace the IAC.
You can clean it with Throttle body injector but that's just a quick fix for now. Good luck and hope this helps.

May 29, 2009 | 2003 Ford Expedition

2 Answers

98 expedition starts then after 15-20 seconds engine dies..


Replace the idle air control valve. Mine just did it today the 15th of August. I replace the Idle air control valve and problem solve. I have a 2000 Expedition 5.4 liter.

Mar 29, 2009 | 1998 Ford Expedition

1 Answer

Wont stay running


You may have a defective idle speed control valve. Clean it first.

Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Nov 13, 2008 | 1998 Ford Expedition

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