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How do you change the EGR valve on a 1994 Cadillac STS?

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2015-07-15 18:37:18
2015-07-15 18:37:18

Just remove the 2 bolts that hold it on and clean where it mounts and put the new on with a new gasket.

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The egr valve is located on the top rear of the engine. It bolts on and is easily removed.

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There is NOT an EGR valve on this engine.

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I'm not sure what year and model you Cadillac is but a p0404 should be for the EGR valve open position performance. You will need to replace the egr valve if the wires are okay. Hope this is helpful.

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Carbon build up inside the EGR valve can cause a no flow code. The valve is located Ênear the center of the rear of the engine. It is held on by 2 bolts and a metal line.

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It does NOT come equipped with an EGR system.

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on the intake manifold near the throttle body

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* Remove the air intake duct from the throttle body and air filter housing * Position the hoses and wiring harness aside to access the EGR valve * Disconnect the EGR pipe * Remove the EGR valve mounting fasteners * Remove the EGR valve and gasket from the manifold.Discard the gasket * Using a gasket scraper clean the EGR valve mounting surface

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* Remove the air intake duct from the throttle body and air filter housing * Position the hoses and wiring harness aside to access the EGR valve * Disconnect the EGR pipe * Remove the EGR valve mounting fasteners * Remove the EGR valve and gasket from the manifold.Discard the gasket * Using a gasket scraper clean the EGR valve mounting surface

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The 1989 Oldsmobile EGR valve is located on the top of the engine, near the back. It is quite simple to change.


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