Skip the auto shop - Our mechanics make house calls

Q: Truck is dying when in drive. 1999 Ford F-150

asked by on

I have a 99 Ford f150 with the 4.6. Here lately it has been rough idling and will die at a red light. I have replaced the EGR valve and mass air flow sensor. I don't know what else to do. I need help this is my only ride.

My car has 166000 miles.
My car has an automatic transmission.

A: Hello. If this issue it only occurring at i...

Hello. If this issue it only occurring at idle, then it is either due to a vacuum leak in the engine or more commonly a failing idle air control valve. This is a common failure on this vehicle.

I usually start by checking the computer for any codes and then I monitor the sensor signals just to make sure nothing is abnormal. If everything is fine then I do a smoke test of the intake system to check for vacuum leaks. If this is okay, then I clean the throttle body and replace the idle control valve. If you are thinking of having your idling issue repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the stalling issue and moving forward with repair.

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

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: Shift to P to drive when I'm already driving?

Try to contact a dealer in your area to see if your vehicle is under the recall for the transmission parking pawl problem. This may fix the problem you are having. There are a few other recalls that your vehicle...

Q: Steering wheel is locked an key wont turn

It sounds like what you are describing is the steering lock mechanism actually doing it's job locking the steering wheel prior to turning the key. Any movement of the steering mechanism, whether at the wheel or the front tires when...

Q: Rpms running too high

Hello. I suspect that the idle air control valve is faulty. The idle air control valve is supposed to smoothly adjust the engine's idle to the changing driver conditions, like stopping at a light. If it is malfunctioning, it can...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.