Skip the auto shop - Our mechanics make house calls

Q: My '98 expedition drives fine for a while, then after a few hours, when sitting still, it idles rough then shuts off.

asked by on

I drive a 98 Ford expedition. It drives fine for a couple hours. After that, it idles rough at stops, then shuts off. I start it back up, I give it gas it shuts off without catching gas. I restart it, without giving it gas, it idles, but still idles rough then shuts off again. I have to literally wait about an hour. Start it up, then it drives fine

My car has 300000 miles.
My car has an automatic transmission.

After some testing done to verify the EGR valve flow to see if the valve is intermittently sticking open causing the stall. This can be done using a scanner with the capability to open and close the EGR valve and monitor the DPFE sensor at the same time. There is a technical service bulletin 05-4-17 to replace the EGR valve if the valve sticks open. The computer system should be retested to verify the proper operation of the EGR valve and DPFE sensor. Once the EGR valve is replaced and system is verified the EGR system is working correctly without the EGR sticking open anymore then have a certified technician, like one from YourMechanic, scan the computer to clear any codes. Once codes are cleared a road test should be done on the car to verify the repairs.

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
  1. Home
  2. Questions
  3. My '98 expedition drives fine for a while, then after a few hours, when sitting still, it idles rough then shuts off.

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: No tail light, instrument panel light, or tag light

Hi there, thanks for writing in. Most ancillary electrical items (like tail lights, instrument panel lights and tag lights) are actually controlled through an electrical relay box. On your Ford Expedition, there is usually a main relay control box and...

Q: the car dies when put in gear

Hello, thank you for writing in. Unfortunately this is one of the situations where the possible causes can be with a lot of different components. You may want to do some further testing on the intake air temperature sensor. There...

Q: How do I use the engine Start/Stop button?

The engine Start/Stop button allows you to turn on or turn off your vehicle without using a key. To start the engine, simply press the Start/Stop button once. To turn off the vehicle, press the button again. Tip The shifter...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
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.