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2002 GMC Envoy engine hesitates between 45-50mph

Tiny
GRIS0004
  • MEMBER
  • 2002 GMC ENVOY
  • V8
  • 2WD
  • AUTOMATIC
  • 256,000 MILES
I have a GMC Envoy with 256,000 miles. I had the transmission replaced 2 years ago and about 3 months after it was replaced I started getting a hesitation in the engine when I was going 45mph. The rpm's will jump erratically. If I take my foot off the accelerator it will stop. If I press the accelerator to speed up it will go away. It does not occur when the engine is first started. It seems to occur after I have driven it for at least an hour interstate travel. Once it starts it always occurs between 45-55mph. I do notice that it seems to use a lot of gas when this happens.
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Friday, August 27th, 2010 AT 2:16 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,289 POSTS
Has the check engine light come on? Have you checked fuel pressure?
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Wednesday, September 8th, 2010 AT 9:05 AM
Tiny
GRIS0004
  • MEMBER
  • 2 POSTS
The check engine light has not come on. I have taken it to 3 different people who tell me that the suv has not errors on the computer.

I have not had the fuel pressure checked but will have it done.
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Wednesday, September 8th, 2010 AT 10:55 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,289 POSTS
Let me know what you find.
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Wednesday, September 8th, 2010 AT 1:37 PM

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