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1990 Oldsmobile Cutlass stalls

Tiny
DAISYGRUMBLER
  • MEMBER
  • 1990 OLDSMOBILE CUTLASS
I have a 1990 olds cutlas cierra 3.3 liter 6 cyl. My car stalls if I am not heavy on the gas at all times. I did the paperclip trick and got code 21 which means tps sensor out of range.I changed the tp sensor and it is still hard to start up. And once I do start it I go about a mile then stall out. Any ideas?
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Monday, November 18th, 2013 AT 7:52 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
First eliminate all vacuum or air leaks in the system. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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Monday, November 18th, 2013 AT 8:19 AM

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