1999 Pontiac Grand Prix accelerating problems

Tiny
RB26DE
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • FWD
  • AUTOMATIC
  • 237,182 MILES
The car tends to jerk forward when accelerating from a stand still but it doesn't do it all the time, it sometimes will do it when accelerating to a higher speed from like 40-55 mph as an example but the problem does go away after a few seconds. There is no check engine light but does any one have any ideas on what I should check or look for, if you need any additional info just tell me I'ill get it to you.
Sunday, October 12th, 2014 AT 3:00 AM

4 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Mass Air Flow sensors will act like that but it may be hard to verify.
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Sunday, October 12th, 2014 AT 6:28 AM
Tiny
RB26DE
  • MEMBER
  • 11 POSTS
So I drove the car around today with no problems at all with the acceleration but I am still looking into it, also something else caught my attention which is a hissing sound from under the hood, is this more than likely a vacuum leak?
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Sunday, October 12th, 2014 AT 8:16 PM
Tiny
RB26DE
  • MEMBER
  • 11 POSTS
Can the maf sensor be cleaned or will I just have to replace it, I'm still looking into this problem. Want to get the car running good before the snow gets here
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Saturday, October 18th, 2014 AT 5:15 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Cleaning wouldn't do anything for a problem like that.
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+1
Saturday, October 18th, 2014 AT 5:19 AM

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