While driving engine shuts off if I take my foot of the accelerator

ANONYMOUS

MEMBER
1996 CADILLAC DEVILLE CONCOURS
118,236 MILES

My car wont stay running ounce I take my foot off the gas it shuts off on me. I just replaced the IAT sensor on it and it was running just fine. Now it's doing it again. What could it be?

Friday, January 11th, 2013 AT 2:44 AM

4 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good evening,

A common issue for this is the EGR valve. When the valve does not close fast enough, it creates a massive vacuum leak and will stall when it comes to a stop. It will start right back up and drive normal until the issue happens again.

I would replace the EGR valve and make sure the passages are clean of all carbon.

I attached the procedure and location of the valve for you.

Roy

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Monday, April 27th, 2020 AT 6:26 PM

RSTATEN

MEMBER
1 POST
1996 CADILLAC DEVILLE CONCOURS

V8 100,000 miles.

Car stalls at stops.

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Monday, April 27th, 2020 AT 6:30 PM (Merged)

BUDDYCRAIGG

MECHANIC
2,262 POSTS

Does it only do it after you have been over 45mph?
Could be the torque convert lock up solenoid.

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Monday, April 27th, 2020 AT 6:30 PM (Merged)

FACTORYJACK

MECHANIC
4,159 POSTS

Egr valve sticking open, fuel regulator leaking, high secondary resistance(plugs/wires). Can you keep it running with some throttle, and does it run poorly at that time?

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Monday, April 27th, 2020 AT 6:30 PM (Merged)