Skip the auto shop - Our mechanics make house calls

Q: EGR valve stuck closed in 1988 F-150

asked by on

I have a 1988 F150 5-liter. It runs for a couple of minutes and then it dies. I have codes for the throttle position sensor--EGR valve stuck closed. It's not in the truck and I plug the TPS and it bugged. Is there any way to test the EGR valve?

A: Although it says the EGR valve is stuck clo...

Although it says the EGR valve is stuck closed, that's not going to make the car stall. You would get more nitrous oxides in the catalytic converter fluid. So, it doesn't affect that. The EGR valve problem is not the one that is making it die. The throttle position sensor can easily make it go bad.

I would say just change the throttle position sensor. That would be the first thing I do. But, when cars die, there are a lot of reasons why they can die. Check out my video "how to fix a car that idles poorly" and also check for the vacuum leaks in the engine. If you have a vacuum leak, that's going to make a car die, too.

If you want to have this looked at by a professional, a technician from YourMechanic can come to your home or office to check your EGR valve and diagnose your car's stalling issue.

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・Save up to 30%

Get a quote

What others are asking

Q: Gas is pouring out of the throttle body. What would cause this?

The fuel pressure regulator is leaking fuel into the intake manifold and may have even filled the engine oil with gasoline. You should have the fuel pressure regulator replaced and the oil and filter replaced. You may have to have...

Q: How do I use the manual zoom?

Manual zoom helps you connect your truck to a trailer for towing. It allows you to zoom in to an object behind your vehicle while keeping the bumper in the image for reference. To use the Manual Zoom. Put...

Q: My trucks battery keeps dying immediately after I shut it off

You may have more than one problem with your truck. The ignition lock cylinder on these trucks would break on the outside and can cause problems with being able to turn the key enough to start the vehicle. A replacement...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...