as soon as the RPMs lower it shuts off?

2001 FORD EXPEDITION
170,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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CAMRONKEITH
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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.
Dec 3, 2024 at 10:23 AM
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STRAILER
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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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Dec 3, 2024 at 12:13 PM