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96 Concours, 90 Deville
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112 Posts
Re: How To Clean The EGR Valve

I kept getting PC1406 in my 96 Concours so I cleaned out the EGR valve today and it fixed it. Thanks again for the tutorial (I also used it ~40,000 miles ago). On the 96 Deville with the stainless steel fuel rail, I had to remove the manifold cover, unscrew the 4 bolts that hold the fuel rail down, pop out the fuel rail/injectors. After the fuel rail moves freely, then you can flex it enough to get access to one of the EGR bolts. I cleaned the EGR valve out with carb cleaner but the pintle was still sticking REALLY BAD. I then went to a wire brush...still sticking. I had my neighbor take a look and he used his flashlight to look inside. Around the rrim where the pintle valve sits closed (flush with the surface that touches the gasket) I had nasty carbon build-up. I had to use a flathead screwdriver to scrape out the carbon. After that, the pintle moved freely and my code is gone. Thanks again!
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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71,116 Posts
Re: How To Clean The EGR Valve

You better start working on cars and trucks to get an idea of just where fuel lines really run. The proximity to the top (not the exhaust side) of an EGR valve is the least of your worries !!
 

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2010 DTS
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87,576 Posts
Re: How To Clean The EGR Valve

Not to mention that it has a heat shield on the fuel line side.
 

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153 Posts
Re: How To Clean The EGR Valve

Does anyone have an issue re-using the gasket.
I've cleaned mine twice now and both times I had to go buy a new gasket b/c there was an air leak.
I even had to have my mechanic help me the first time and he said never to re-use the gasket. Anyone else having a problem getting a good seal?
Is there some special trick to it...?
 

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13 Challenger RT, 11 CTS Coupe Premium, 94 Eldorado (RIP)
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1,306 Posts
Re: How To Clean The EGR Valve

When I took my egr out to clean it, I didn't use a new gasket. Never had a problem with it.
 

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1997 Eldorado
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637 Posts
Re: How To Clean The EGR Valve

how do you clean one from a 97 eldroado i got one bolt off but the other is under the fuel line which i cant get off
 

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Cadillac
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37 Posts
Re: How To Clean The EGR Valve

Sorry, I can't tell by the last picture, where exactly do you spray the carb cleaner? everywhere but inside the allen ekey looking hole?
 

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1996 STS
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4 Posts
Re: How To Clean The EGR Valve

Is there anything called a "PVR" valve? Someone told me that was my problem but it was probably the EGR valve he was thinking of. Suggestions"
 

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94 Eldorado, and a 99 ETC
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3,887 Posts
Re: How To Clean The EGR Valve

Sorry, I can't tell by the last picture, where exactly do you spray the carb cleaner? everywhere but inside the allen ekey looking hole?
You can spray it in there just as long as you're careful not to get it into the big canister portion of the valve. The carb cleaner will eat away at the insulation on the electrical windings of the valve if it does go in that area.
 

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Seville STS 1994
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3 Posts
Re: How To Clean The EGR Valve

I just followed the instructions and cleaned out the EGR-valve. Replaced air filter as well. The car runs perfect without the jerky rpm at low speed. But here's a problem: the cruise control as well as the left power window on the backdoor stopped working.

Does anyone know why? I know this is a pretty common problem but I really don't want my top condition Cadillac suffer from this :crying:
 

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Re: How To Clean The EGR Valve

Great thread! I just cleaned my EGR and it did the trick. Biggest problem I had was that the last person to replace/clean the valve didn't put the brace for the fuel rail back on correctly, so it (the brace) was over the nut. I had to pry the fuel rail over with a screwdriver with one hand and remove the bolt with the other. That was sorta scary because I didn't want to kink up the fuel rail, but it was fine. I figured the guy who did the last job couldn't find the hole. I never have that problem. :cool:
 

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Eldorado ETC 1995
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57 Posts
Re: How To Clean The EGR Valve

Great tips here.
But I wonder about the pintle. My Chilton repair book says the pintel should be cleaned. They have a picture on page 4-7 that shows the assembly of the EGR valve. It looks like the hole you are not spraying solvent in has a screw that allows to take the EGR valve apart.
Is it possible to get it back in correct function if I take it apart? I'm especially worried about the spring tension.
Electric cleaner should not dissolve the insulation, but clean out the dirt. Do you think that would lessen the risk of ruining the mechanism if it came into the hole beneath the valve?
 

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2010 DTS
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87,576 Posts
Re: How To Clean The EGR Valve

I spray it in the opening under the "can" where you can see the pintle valve and use a dental pick to scrape the carbon loose. Tedious and time consuming, but with the right tool you can do a good job.
 

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105 Posts
Re: How To Clean The EGR Valve

I tried to get the EGR out on my 95 STS and the steel fuel line is in the way and won't budge! What do I have to do to get the fuel rail out of the way. Looks like the factory upgrade was done.
 

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Super Moderator
2010 DTS
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87,576 Posts
Re: How To Clean The EGR Valve

You need to separate the rail from the supply line and then remove the hold downs. Then lift the rail and injectors out.
 
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