Car hesitates when accelerating

2004 PONTIAC GTO
138,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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SEBASTIANTUDON
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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.
Feb 5, 2020 at 3:43 PM
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ASEMASTER6371
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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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Feb 5, 2020 at 6:39 PM
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SEBASTIANTUDON
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If it is something with the fuel system does that mean the fuel pump is going bad?
Feb 5, 2020 at 6:47 PM
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ASEMASTER6371
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It is possible, yes, but needs to be confirmed.

It could also be the regulator or injectors as well.

Roy

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Feb 5, 2020 at 6:54 PM
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SEBASTIANTUDON
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Is there a way to check the regulator or the injectors?
Feb 5, 2020 at 7:46 PM
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ASEMASTER6371
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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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Feb 5, 2020 at 7:57 PM
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SEBASTIANTUDON
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Thanks for the info, appreciate the help!
Feb 5, 2020 at 8:01 PM
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ASEMASTER6371
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No problem.

You are welcome.

Always glad to help.

Roy
Feb 5, 2020 at 8:02 PM