Car Shutters and Stalls

123,000 MILES • 4 CYL • FWD • AUTOMATIC
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IBLACK
  • MEMBER
  • 1 POST
Car shutters & stalls.

1999 Saab 9-3 Turbo Automatic.

Car starts up fine and idol is right around 1000 rmps. Right when the car turns on the Idol is fine, and when it is put in gear it remains the same. When the car changes gear when cold or the car is coming to a stop when cold it will shutter when gas is applied it stops shuttering and doesn't stall or if the car is put it neutral it also does not stall, but if you don't give it gas or don't put it in neutral it stalls. Once the car is warm there is no problem at all. About 4 months ago i had the brake booster pump and all of the vacuum tubes replaced. The temperature sensors were also replaced. Any Ideas of what might be causing this problem.

Thank you!
Jan 11, 2011 at 10:10 AM
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MNTHNY4
  • ✓Experienced Mechanic
  • 612 POSTS
U HAVE A VACUUM LEAK IN THE INTAKE SYSTEM ,CHECK COMPLETE INTAKE SYSTEM FROM MAS AIR FLOW ,TURBO INTERCOOLER HOSES & THROTTLE BODY O-RING SEALS ,DOES YOUR CAR HAS A IDLE CONTROL VALVE WITH HOSES COMING FROM LOWER THROTTLE BODY HOUSING TO UPPER HOUSING SECTION IF YES VALVE MAY BE FAULTY & HOSES LEAKING
Jan 11, 2011 at 1:35 PM
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