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.
Friday, August 27th, 2010 AT 2:16 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Has the check engine light come on? Have you checked fuel pressure?
Was this
answer
helpful?
Yes
No
+1
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.
Was this
answer
helpful?
Yes
No
Wednesday, September 8th, 2010 AT 10:55 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Let me know what you find.
Was this
answer
helpful?
Yes
No
Wednesday, September 8th, 2010 AT 1:37 PM

Please login or register to post a reply.

Related Engine Hesitate Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Hesitation
GUIDE
Hesitation
An engine hesitation is an interruption of continuous power during acceleration. When a engine is hesitating it will cause the car to lunge or surge which will cause a...
VIEW MORE