Question about 1994 Pontiac Bonneville

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Egr valve how do u test a vacume egr valve i can **** threw mine and it does nothing and blow threw it and air leaks out is it bad it has the code on my truck

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  • Tommy Walker May 11, 2010

    As a matter of fact, the valve could be stuck either way. You need to explain which code you retrieved. Most of the times, it is a simple fix. You have to clean out the tubes going to and coming from the valve. This is what prematurely sets the code. The tubes get clogged with carbon and set the code because the valve does not operate as it should with the restriction.

    Keep me informed, but go ahead and spend the money on a new EGR Valve. After you spend the money and take the time to put it all together and have the same problem, remeber this clarification request. I wish you would have responded to the request instead of taking a shot in the dark with the best answer, for your sake. Seriously, we go through this problem all of the time in my shop. Usually the customer comes in with a new EGR installed and we recharge the same labor to clean the tubes. Good luck.

  • Tommy Walker May 11, 2010

    You could never reproduce the vacuum required to operate this valve from your lungs. What code did you get?

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  • Master
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If you can hear the air leaking out then it is bad. Means the valve is stuck wide open and not closing at all like it should

Posted on Feb 14, 2009

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