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After replacing the fuel pump engine hesitates

Tiny
CA1970
  • MEMBER
  • 2006 NISSAN SENTRA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
Fuel pump went bad, put new fuel pump in, car fired right up. But now when you rev engine it has a serious hesitation and acts like it has a rev limiter or cut off. Tachometer bounces and just cuts in and out, Could a Mass Air sensor cause all that?
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Sunday, November 29th, 2020 AT 2:24 PM

3 Replies

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

Is the check engine light on after this issue started? The first thing that needs to be done is to perform a code check to determine the check engine light codes that are stored in your vehicles computer that is causing this issue. Here is a tutorial showing what is involved to check for these codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Places like Autozone auto parts stores can check codes for free. After doing this test get back to us with the code information and we can then properly diagnose. Hope this helps and thanks for using 2CarPros.
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Sunday, November 29th, 2020 AT 2:29 PM
Tiny
CA1970
  • MEMBER
  • 36 POSTS
Codes were scanned, it did show Mas air was bad, but never seen one act like a rev limiter before.
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Sunday, November 29th, 2020 AT 7:49 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Can you provide us with the code numbers that are present? That will help us determine the particular diagnostic steps to look into. Get back to us and we'll go from there. Hope this helps and thanks again for using 2CarPros.

Danny-
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Monday, November 30th, 2020 AT 1:21 PM

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