2005 Pontiac Grand Prix engine sluggish

Tiny
DAVE_0755
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 40,000 MILES
The rpms rapidly fluctuate up and down accelerating between 1000 and 1500. The car seems sluggish and shifts into second gear too soon also. This only happens when I take off from a stop and slowly accelerate. If I take off rapidly the vehicle accelerates fine. It will shift good and firm at hard acceleration also. The car idles good and cruises at highway speeds fine. Issue only occurs during slow accelerations. Such as city driving and stop and go traffic.
Thursday, April 30th, 2009 AT 9:58 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Sounds like the TCC (torque convertor clutch lockup) solenoid is not releasing.

This is controlled by PCM, check with dealer or trusted garage, they may be able to unplug the connector to it, if problem dissappears, then the solenoid must be replaced.
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Friday, May 1st, 2009 AT 7:29 AM

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