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Idles fine but stalls on acceleration

Tiny
KILONZO
  • MEMBER
  • 1989 FORD FESTIVA
  • 1.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Car listed above EFI I can start this car while standing outside the driver's door. It idles smoothly and I can rev it up just fine. The problem is when it is in gear it still idles fine until I accelerate. It stalls immediately when in gear and I accelerate. Periodically it may drive fifty to a hundred yards under a heavy acceleration but it still stalls without warning. Fuel regulator is new fuel filter is new and I cleaned the MAF sensor. I don't like just changing parts to try a fix the problem. I want to try and diagnose wants wrong. Thanks in advance for your ideas and suggestions.
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Wednesday, May 20th, 2020 AT 4:30 AM

3 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

This first thing I suggest is to test the fuel pressure.It sounds like you might have a weak or low performing fuel pump.If you don't have access to a fuel pressure tester most auto parts stores have tool loaner programs and can rent you one.Here is a tutorial showing what is involved on how to test and another on how to replace an in tank fuel pump:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

I've attached picture steps below on how to replace your fuel pump for your Festiva. The specifications for your car are 25-31 p.s.i. Hope this helps and thanks for using 2CarPros.
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Wednesday, May 20th, 2020 AT 5:11 PM
Tiny
KILONZO
  • MEMBER
  • 2 POSTS
Hi Danny, thanks for getting back to me. I am going to follow your advice and I will update you on the results. Thanks again and stay safe.
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Thursday, May 28th, 2020 AT 12:44 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You're welcome!
Let us know what you find and get back to us. Thanks again for using 2CarPros.

Danny-
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Thursday, May 28th, 2020 AT 2:59 PM

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