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Acts like it is running out of gas when in drive

Tiny
MSKELLYGIRL1977
  • MEMBER
  • 1991 FORD BRONCO
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
A friend sold me this truck about 8 months ago and didn't know the issues with it at the time. Well got it home on a tow truck. And when I started it up, it idles fine, put it in drive to go around the block it acts like its running out of gas. It's a fuel injected throttle body and I just can't figure it out.
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Tuesday, June 7th, 2022 AT 8:07 AM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Have you checked fuel pressure to see if it is low? If you haven't, you should. Keep in mind, there are a few different things that can cause this type of feeling, but the pump is usually the problem.

Here is a link that explains how to test fuel pressure. Take a look through it and let me know if you are comfortable doing it.

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

Also, if you haven't, consider retrieving diagnostic trouble codes. This vehicle has an OBD1 system. You don't need a scanner to get codes. Follow the directions in this link:

https://www.2carpros.com/articles/ford-lincoln-mercury-obd1-1995-and-earlier-diagnostic-trouble-code-definition-and-retrieval

Let me know the results or if you have questions.

Take care,

Joe
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Tuesday, June 7th, 2022 AT 6:41 PM
Tiny
MSKELLYGIRL1977
  • MEMBER
  • 3 POSTS
Yes, it has great pressure and I also have replaced the filter. Someone told me they don't think it's timed right because it sounds terrible only when I put it in drive and give a little gas to go. It sounds like knocking and pinging, but it idles fine.
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Wednesday, June 8th, 2022 AT 9:35 AM
Tiny
MSKELLYGIRL1977
  • MEMBER
  • 3 POSTS
Also, it shuts off when the negative cable is removed and I also took alternator off and had it tested, it's fine.
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Wednesday, June 8th, 2022 AT 9:44 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

If possible, record the sounds you hear when it's placed in gear and upload it for me to hear. I will watch for your reply.

Take care,

Joe
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Wednesday, June 8th, 2022 AT 8:57 PM

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