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Bucking, chugging, stalling

Tiny
CAS5
  • MEMBER
  • 2008 FORD ESCAPE
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 820,000 MILES
My car is bucking and stalling like it's getting no gas. We have replaced the fuel filter, fuel pump and the fuel pressure sensor. It's still doing the same thing and throwing codes that it's running too lean. What else can we do?
Mileage is 82,000.
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Friday, May 7th, 2021 AT 1:17 PM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
If it is setting lean codes then you may have a fuel issue or an air leaking too much air in and it is leaning out the fuel mixture.

Here are some guides that will help with this:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let's start with checking for a vacuum leak as shown above and go from there. Let us know what you find. Thanks
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Saturday, May 8th, 2021 AT 4:52 PM
Tiny
CAS5
  • MEMBER
  • 2 POSTS
The problem was found this morning. It turned out to be the EGR valve.
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Saturday, May 8th, 2021 AT 5:36 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
That is great. I think we would have gotten there eventually but this update will surely help others jump right to that and at least test it or replace it.

Thanks for using 2CarPros. Please come back in the future. Thanks.
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Sunday, May 9th, 2021 AT 8:04 PM

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