My 2004 Deville CTs Northstar has problem with engine dying when I stop to turn and the engine slows to idle speed! The extra load of the power steering pump overloads the idling engine! Any theories?

Asked by Nov 15, 2016 at 08:20 PM about the 2004 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

My 2004 Deville CTs Northstar has problem with engine
dying when I stop to turn and the engine slows to idle
speed! The extra load of the power steering pump
overloads the idling engine! Any theories?

2 Answers

80,315

There's an idle speed up switch on the power steering line. When turning the steering wheel hard as in a parking or low speed turning maneuver the increased pressure on the power steering hose activates the switch to send a signal to the computer to speed up the idle about 50 RPMs to compensate for the added load and prevent stalling. HTH. -Jim

2 people found this helpful.

I discovered today it also does it when idling and I apply the brake! Idle speed is 750 rpm!

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