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2001 Nissan Sentra accelerator hesitation

Tiny
GPORTMAN
  • MEMBER
  • 2001 NISSAN SENTRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 18,000 MILES
My engine never stalls and idles well. When I take my foot off the accelerator at any speed there is a "dead spot" on the pedal when I want to resume speed. The engine will immediatel drop to an idle unless I persist and push the pedal past that "dead spot"--then it suddenly cuts in and will accelerate normally. I never get a "service engine" light.
A new fuel pump was installed--no improvement.
I disconnected the two electrical leads to the throttle position sensor which corrected the problem but of course it now idles too fast and would not be running as efficiently as it could.
Could the problem be the TPS even though I am getting no light and a scope does not show any error codes?
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Monday, August 4th, 2008 AT 9:20 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Short answer is yes, the TPS could (and sounds like it is) the problem.
To verify this, you would need a hand held scanner, go to live data mode and watch the TPS output as you slowly push the gas pedal. The ign. Would need to be on but not running.
The TPS should show a gradual voltage increase as it is depressed. If not, then replace the TPS
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Tuesday, August 5th, 2008 AT 5:37 AM

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