Question about 1991 Cadillac DeVille

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I replaced the egr valve on my 91 cadillac seville because it was turning off and that was what the mechanic told me it was but its still stalling and turning off in every stop what else can be the problem??

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Posted on Jan 02, 2017

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SOURCE: Oldsmobile Alero EGR valve bad

you need to clean the egr port remove egr valve and it is easier if you remove throttle plate you will see the port with carbon built all up on it in plenum this is a common problem
your valve is probably fine

Posted on Sep 19, 2008

  • 186 Answers

SOURCE: when stopped (car in drive) the idle drops and the

That could be but the first thing I would try is to clean the throttle body. You can do this with a rag, toothbrush , and carb cleaner. Open the thottle boby, spay carb cleaner, scrub front, back, and edges with toothbrush. Then spray again and do the same withe the rag. Do this until it's clean. The car will run rought at first as it burns the carb cleaner then should staighten up. Good luck.

Posted on Aug 06, 2009

  • 2841 Answers

SOURCE: bad egr valve

You can try cleaning it. Go to your local parts store and buy a can of brake cleaner. Remove the EGR valve and spray it into the valve and let it set 8 hours. Pour out the cleaner and clean the carbon off with a wire brush. Reinstall the valve and see if that helps. If not, you will have to buy a new one and it will not cost $316 if you DIY.

Posted on Oct 18, 2009

  • 31 Answers

SOURCE: i need a list of the error codes for a 91 cadillac

Here's a link for GM OBD-I codes, complete with extraction directions. Fairly awesome, if you ask me :)

Hope it helps! Good Luck!!!

Posted on May 22, 2010

  • 3740 Answers

SOURCE: R&R EGR Valve 97 Nissan

It takes a 17 mm wrench to losen the tubing on both sides of the valve. Then it is a matter of unmounting the bracket and pulling off the vacuum line. Make sure that you losen both lines BEFORE unmounting the bracket or you will never get it off. Sometimes getting the tube fitting (flare nut) loose requires a flare nut spanner wrench. Some EGR vlaves on have one flare unt and have gasket under the EGR valve where it mates to the manifold. Make sure you replace the gasket if yours has one.

(flare nut spanner wrench)

I also recommend that you use a long piece of solid copper wire #10 to push through the tubes to remove the carbon build up.

It really is a matter of time. The most difficult thing about changing an EGR valve is getting the flare nut(s) loose.

Thanks for using FixYa.


Posted on Jun 22, 2010

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