EGR valve 94 blazer 4x4

Dear UeBklyn, I have a 1994 s10 4.3 vortec as well, and have had the same problem. I found an interim fix that seems to work. I pulled my EGR valve out, and placed a small piece of stainless steel screen between the valve and the engine. The carbon is a continuing problem, and will keep stopping the EGR from actuating correctly. The screen needs to be stainless due to corrosion and heat from the exhaust. It seems to work well, since any small pieces of carbon pass though the EGR anyway. There were as many as 10 different EGR valves used on those darn vortecs, and chevy didn't seem to get their act together very well. Mine failed 3 times before i got ticked off and did the screen thing. I hope the info helps a bit.

M Russon

There is a site online that has made a gasket for this problem.

It has the screen already on it. However you canalso do it yourself. I made up a screen for mine that goes as deep aspossible into the manifold and tapers out to the port and is then sandwichedbetween two gaskets. With the long reach screen the carbon chunks collectbut there is still a lot of room for exhaust to get through. It is really apoor design though.