Skip the auto shop - Our mechanics make house calls

Q: Truck dies when not on the throttle.

asked by on

Hi, I have a 1995, Ford F-150, extended cab, 2wd, 2 tank pickup with the 5.0 efi. When I am driving but step on the brakes to stop the engine dies unless I put it into neutral and step on the throttle. I have replaced the entire ignition system from plugs to ignition control. I've replaced the fuel regulator and filter. She runs like a dream going down the road with no hesitation or lack of power. Just at an idle she dies. At low throttle she backfires. I replaced the egr sensor also. I am at a complete loss. I'm gonna try timing again to see if that is it. Any help would be appreciated. She is my project truck so I'm trying to keep cost down.

My car has 14000 miles.
My car has an automatic transmission.

A: A few things I would check are the timing...

Hello.

A few things I would check are the timing, the idle air control valve, and the condition of the vacuum hoses. Retarded ignition timing can sometimes cause low throttle issues, and can definitely cause stalling. The idle air control valve is the component that is responsible for maintaining engine idle speed. If it fails or has an issue the engine will have trouble, or will not be able to hold a proper idle. Finally, vacuum leaks due to old or broken vacuum lines can also cause stalling and low rpm performance. I would verify the timing and then check the idle air control valve, and go from there. If you need help, a technician from YourMechanic can come to your home or office to inspect your car dying problem and replace the idle control valve if necessary.

Regards,

Eduardo YourMechanic

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: the power windows do not operate

Use a test light to check for power at the switches - especially the driver's door master switch. If none of the windows work from their individual switches either, you can have a bad master window switch. A common problem...

Q: Idling low at 1 to 1.5k rpm. can not get rpms above 3k.

It sounds like you may have a couple of different issues going on here. At idle your car should be hovering around 750-800 RPM's consistently. This is generally controlled by the idle air control valve which a valve that reads...

Q: Ignition broke off

I believe the ignition lock cylinder is an integrated, non serviceable component in the steering column. The entire column may have to be replaced. I recommend having a qualified technician, like one from YourMechanic, take a look at it and...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...