Car hesitates when accelerating

Tiny
SEBASTIANTUDON
  • MEMBER
  • 2004 PONTIAC GTO
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 138,000 MILES
Car hesitates at low speeds, if I’m driving at low speeds and do a mild acceleration car hesitates and then picks up speed it takes a few seconds and kinda jerks forward.
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Wednesday, February 5th, 2020 AT 3:43 PM

7 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good evening,

Two things come to mind.

https://www.2carpros.com/articles/engine-hesitates

1. Low fuel pressure. Test the fuel pressure to be sure it is correct. Low fuel pressure will cause this issue.

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

2. A partially clogged catalytic converter could cause this as well as the engine cannot breathe correctly.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

Roy
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Wednesday, February 5th, 2020 AT 6:39 PM
Tiny
SEBASTIANTUDON
  • MEMBER
If it is something with the fuel system does that mean the fuel pump is going bad?
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Wednesday, February 5th, 2020 AT 6:47 PM
Tiny
ASEMASTER6371
  • EXPERT
It is possible, yes, but needs to be confirmed.

It could also be the regulator or injectors as well.

Roy
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Wednesday, February 5th, 2020 AT 6:54 PM
Tiny
SEBASTIANTUDON
  • MEMBER
Is there a way to check the regulator or the injectors?
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Wednesday, February 5th, 2020 AT 7:46 PM
Tiny
ASEMASTER6371
  • EXPERT
If you test the fuel pressure, that will tell you if you have the correct pressure, then you can also see if the pressure bleeds off. It will lower a little but should no go to 0.

I posted the procedure in my first response.

Roy
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Wednesday, February 5th, 2020 AT 7:57 PM
Tiny
SEBASTIANTUDON
  • MEMBER
Thanks for the info, appreciate the help!
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Wednesday, February 5th, 2020 AT 8:01 PM
Tiny
ASEMASTER6371
  • EXPERT
No problem.

You are welcome.

Always glad to help.

Roy
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Wednesday, February 5th, 2020 AT 8:02 PM

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