Q: 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?
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. Q: 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: PO153 02 circut low response bank2 sensor 1 What does this mean?

Your car has Oxygen sensors in the exhaust system to give the computer information on the fuel mixture. The Oxygen sensor produces a small voltage when it heats up and if there is oxygen present in the exhaust, as in...

Q: Truck won't run like it used to

Hi, thanks for writing in. Believe it or not, this happens quite a bit when people swap OEM air filters to K&N or other products. It has nothing to do with the aftermarket part however. The P-0104 OBD-II error code...

Q: Car making noise like something is loose.

I would have a technician inspect the car for the noise. If something is loose it could be dangerous to drive.

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...