Pretty certain. It was one of the things I checked out again when the engine started running poorly at idle but was not setting codes. EGR would let it idle rough, but then set a DTC when you reached full operating temps at cruising speeds. No DTC at all, just sitting there, loping and spewing what smells like half-burned gas-stink out of the exhaust. :P Lifting out the IMTV not only revealed pooling, but a very clean passenger side in the plenum. A tap on the key to let it run the fuel pump makes the fuel regulator leak gas like a cheesecloth. :P
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Originally Posted by BlazerLT
you sure it is not your EGR valve?
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