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My 2004 Ford Explorer 4.0 v6 will start but won't idle. Replaced the Throttle Position Sensor. It would idle great, but would not accelerate. Replaced the Electronic Throttle. Now we're back to original problem-will start but immediately dies. Any help is greatly appreciated.

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Posted on Jan 02, 2017


SOURCE: 4.9 liter will idle but wont accelerate have to start with ether

yes checked fuel pressure and replaced the fuel filter, checked the mapp sensor,tested throttle position sensor, has strong spark, 50psi fuel pressure, fresh tune up, runs real rich and rough idle but wont rev up like fuel injectors arent speeding up, also checked exhaust. thanks julius

Posted on Oct 10, 2008

michigan man
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SOURCE: 1996 Ford Explorer engine sputters

after you replaced the fuel pump did you replace the fuel filter also check out the EGR valve and all vacuum lines especially the one behind the throttle body

Posted on Feb 07, 2009

  • 2418 Answers

SOURCE: 2004 Ford F350 diesel, changed fuel filters hard starting

Pull the filters and ck for plastic or o-ring in wrong place. Something is up in the filter. 

Posted on Jul 28, 2009

  • 85 Answers

SOURCE: Where is the camshaft position sensor on a 2000 Ford Explorer?

in the rear like where the dist would normaly be

Posted on Dec 31, 2009

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SOURCE: I need to know how to replace the throttle

The TPS is a small switch about the size of a butane lighter. It has 1 electric connector and 2 screws. It is located on the airhorn which is the metal part behind all the plastic ductwork of your engines air filter.

You unscrew the part and it will come off. There is a small slot to match the flap on the shaft it attaches to. The TPS fits onto this shaft and thats all you have to worry about before replacing the screws. Then tighten the part, switch electric connections and you should be done.

If he engine idles a little faster or slower, one of the screw slots is elongnated. You loosen both screws and slightly twist the slot to your preference and then tighten. Thats all it takes.

Posted on Apr 23, 2010

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2004 Ford explorer bogs down when attempting to accelerate.

Could be a couple diffrent thing's , TPS - throttle position sensor , mass air flow sensor . If you haven't replaced them already ,there are videos on youtube for testing them . Having it hooked up to a scan tool that can show engine sensor data would save some time .

Apr 15, 2017 | Ford Cars & Trucks

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2006 Ford Explorer. Wrench light (powertrain) and Check Engine light is on. The codes say Throttle Motor, Throttle Position Sensor and a couple other throttle problems. While engine (REALLY ROUGH) is...

Non of what was replaced was had
anything wrong with those parts

The only issue is Class A Cylinder misfires
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Hi Stephen, what do you know about a 1983 Ford Crown Victoria? Runs great, then stalls and won't start. replaced a few things already, still the same. Any ideas?

have you checked into the fuel throttle sensor (throttlebody)?? im haaving issues right now as well with my 2004 explorer

Jan 25, 2013 | 1983 Ford Crown Victoria

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Electronic throttle control light is on

Hi. The system uses a sensor that positioned on the throttle body to control acceleration. The sensor is called the Throttle Body Position Sensor. That needs to be replaced. But its not as simple as just replacing it. The cars computer then needs to be calibrated to the new sensor. normally this is a simple task however in my experience with your ford it wasn't that simple. It needs to be calibrated using a Special diagnostic tool. This one isnt a DIY fix, you will need profession help. But the good news is its an easy fix and shouldnt take more than an hour and is cheap as well. Its just you need someone with the skill set,

But i should also mention that I didn't need to replace the sensors in most of the vehicles. The solution was to remove the sensor, I sprayed it out with WD40 and contact cleaner, let it dry out and then put it back in, When the vehicle started it idled roughly for a few minutes and then started working fine.

If you wish to attempt that yourself , locate the throttle body (look at where the acceleration cable connects and you will find it). locate the sensor, (only one with wires coming out of it on the throttle body), remove it, clean it, replace it.

Dec 28, 2012 | 2004 Ford Explorer

1 Answer


the iac code has nothing to do with the maf . the maf is your mass air flow sensor and it is in the air tube going to the throttle body. the iac is your idle air control valve that is in the throttle body next to the throttle position sensor

Dec 03, 2012 | 2004 Ford Explorer

1 Answer

2004 Ford Explorer has trouble starting and once shut down as my wife was driving it!

2004 Ford Explorer: the wrench light came on - which according..limp

Customer Question

My husband wash the engine of our 2004 Ford Explorer. About 2 hours later the wrench light came on - which according to the manual it has something to do with the Electronic throttle control and now I guess it is running in default "limp-home" operation?? Sounds serious. What does this mean since there is no other explanation in the manual.
Hello and welcome to Just Answer!this vehicle uses an electric throttle control system and has no throttle cable or mechanical link between the accelerator pedal and the throttle body on the engine. This is commonly known as "throttle by wire". When the wrench light comes on, it signifies that there is a problem with the electronic throttle control system. The system consists of accelerator pedal position sensors, or sensor on the throttle pedal (there are more than one as back ups incase one fails), throttle position sensors out on the throttle body itself and there are more than one of these too and a throttle motor that actually opens and closes the throttle plate. If the system detects a fault in any of the sensors or the motor itself, it will turn on the wrench light and go into "limp mode". In limp mode, depending on what the computer thinks is wrong, it will either limit the throttle to about 35% or it will command idle and won't let the engine accelerate at all. It does this because when a sensor fails, the system's ability to control the throttle is compromised and as a safety meausre to keep the engine from accelerating when not commanded to do so, the throttle is limited. this problem is likely due to water intrusion into a sensor or an electrical connector. I never recommend using a water hose to clean an engine as water can infiltrate connectors and sensors and cause problems.This is not an easily diagnosed problem and if it doesn't go away when the water dries, will have to be taken to a diagnostic shop to be trouble shot and repaired.

May 05, 2017 | 2004 Ford Explorer

2 Answers

2004 explorer xlt , when start idle jump all the time , what could be the problem? thank you

try checking for a vacumm leak,or throttle position sensor,or idle air control

Aug 23, 2011 | 2004 Ford Explorer

1 Answer

I just replace my throttle position sensor of 2004 ford explorer, After replace new tps when i start my vehicle it,s start well but it,s just in idle position and not accelerator working when i am giving...

nido virgini, There is a certain way that the sensor goes in when replacing it. Take the sensor off and see if the blade is properly turning the sensor. If the sensor is not put in properly it will not be turned to raise the signal to the computer and thus will only idle. After you get the sensor in properly then you will have to drive it for a while so that the computer can relearn the new parameters from the new sensor. Good luck with this.

Jun 14, 2011 | 2004 Ford Explorer

1 Answer

4.9 liter will idle but wont accelerate have to start with ether

yes checked fuel pressure and replaced the fuel filter, checked the mapp sensor,tested throttle position sensor, has strong spark, 50psi fuel pressure, fresh tune up, runs real rich and rough idle but wont rev up like fuel injectors arent speeding up, also checked exhaust. thanks julius

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