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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Truck is dying when in drive. 1999 Ford F-150

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: Car stalled out while driving, and can't get it to turn over - 1998 Ford Escort

Hi there. Sometimes the best way to find a problem with starting is to simplify the situation. It looks like you've checked all the major issues that help a motor start, but you might want to inspect the throttle body...

Q: Can you tell me how long it would take to replace a 1999 Cadillac Deville alternator

Hello there. The alternator replacement should call for 2.8 hours replacement time. The radiator needs to be removed and the A/C evacuated and recharged. There may be additional part charges for coolant and refrigerant. If you would like to have...

Q: How to change sparkplugs? 1997 Cadillac Eldorado

Hi there - your first move would be to carefully sketch or cellphone camera record each coil position, then removed the coil packs. Using a spray tube, hose down the spark plugs with rust penetrant (WD-40, PB Blaster or similar),...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.