1998 Pontiac Grand Prix Engine Stalls/ Transmission doesn't

Tiny
BLKPANA27
  • MEMBER
  • 1998 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 138,000 MILES
98 GrandPrix GTP, when started it hesitates. Once driving at low speeds, the vehicle doesn't shift out of 2nd gear and when I pull my feet of the ascelerator the rpm fluctuates to the point of stalling. Has a brand new transmission that I put 10,000 miles on it, I recently had it in the shop for the engine stalling after it was started. Very Recently I flush the radiator and coolant system. Has a brand new SLP exhaust system and I havent replaced the Catalyc Converter. Also if I tap the accelerator when at idle, the rpm drops to about 500 rpms. What can be causing these issues?
Monday, July 19th, 2010 AT 5:55 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi Blkpana27, Welcome to 2carpros and TY for the donation

Do you have a check engine light On and when was your last tune-up? A badly needed tune-up will affect the transmission operation/shifting points

Lets try cleaning out the idle air control valve and EGR/PCV valves and test throttle position and manifold absolute pressure sensors, also clean the MAF sensor with an approved cleaner
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Monday, July 19th, 2010 AT 6:22 AM

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