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1995 Pontiac Grand Am hesitation

Tiny
AXEL01
  • MEMBER
  • 1995 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 52,000 MILES
I have a 1995 Pontiac Grand Am with the 2.3 L Quad 4 engine and when I am driving at a steady speed the car will act as if the accelerator is not pressed at all even though it is. I do not believe it is the transmission because the engine does not rev at all during this. This problem is intermittent and I have went through all of the sensors and replaced them. The TPS, O2, and the MAP sensors are brand new and I am still running into this problem. The car only has 51,000 miles. Any feedback on this issue will be greatly appreciated. Thank You
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Thursday, August 27th, 2009 AT 2:13 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
If check engine light is on, retrieve codes, if no check engine light, then check fuel pressure with a mechanical gauge and spark with calibrated tester.

Also consider you may have a clogged convertor, this can be checked by performing a backpressure test, or have someone rev engine in park and with glove on, feel if exhaust gases are moving freely through pipe.
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Saturday, August 29th, 2009 AT 8:37 AM
Tiny
AXEL01
  • MEMBER
  • 2 POSTS
Check all of that and fuel pressure is good I have spark and check the cat what about a crank senor
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Saturday, August 29th, 2009 AT 5:52 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Crank sensor should show RPM while cranking, if not then crank sensor is bad.
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Sunday, August 30th, 2009 AT 7:07 AM

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