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As soon as the RPMs lower it shuts off?

Tiny
CAMRONKEITH
  • MEMBER
  • 2001 FORD EXPEDITION
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
The car will start if you give it gas but as soon as the RPMs lower it shuts off. I have no check engine light or codes I replaced the fuel pump, fuel filter, cam sensor, fuel pressure regulator, idle air control valve also checked fuel pressure with a gauge and it was fine.
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Tuesday, December 3rd, 2024 AT 10:23 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
It sounds like you have a vacuum leak which can be at the PCV valve feed line which I have marked in the images below or the EGR valve is not closing completely.

Here is a guide to help you see the easy problems that can cause this issue:

https://www.2carpros.com/articles/stall-at-idle

Here is a video to how you how to test the EGR valve and how to remove it in the images below:

https://www.youtube.com/watch?v=DqUCbbKdWf4&t

Check out the images (below). Please let us know what happens.
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Tuesday, December 3rd, 2024 AT 12:13 PM

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