Repair help

Tiny
RACHELJIMINEZ
  • MEMBER
  • 1993 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 139,000 MILES
1993 Cadillac deville has hardstart and stalls upon braking
Friday, August 19th, 2011 AT 8:28 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
It could be a possible fault with the idle speed control motor, or more specifically the throttle switch that is integrated into it. It may be indicating that the throttle is at rest when it is not. The result is it seeing the increase in RPM when you accelerate, and wthdrawing the shaft all the way in to try and bring the speed down. The result is the throttle plate slamming shut, and resulting stall. This would also create a hard start, as the airflow is choked off. It would probably start easier with a little pedal apply.
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Saturday, August 20th, 2011 AT 2:26 AM

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