Yes, it is an issue. Have your mechanic get GM's top engine cleaner
(I think that's the name), or find Seafoam. This will clean the top
end of the engine without teardown. Also, have your mechanic look
into service bulletins on your truck, there's one that covers this
problem, the fix is replacing the valve and the EPROM.
On 25 Jun 2003 06:46:30 GMT, email@example.com (UeBklyn) wrote:
firstname.lastname@example.org (UeBklyn) wrote in message
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.
There is a site online that has made a gasket for this problem.
http://www.tomco-inc.com/ It has the screen already on it. However you can
also do it yourself. I made up a screen for mine that goes as deep as
possible into the manifold and tapers out to the port and is then sandwiched
between two gaskets. With the long reach screen the carbon chunks collect
but there is still a lot of room for exhaust to get through. It is really a
poor design though.
Pacifism - The theory that if they'd fed
Jeffrey Dahmer enough human flesh,
I have a 94 Jimmy (4.3 of course) and within the last couple of years if
been haveing the egr carbon up. sometimes i have to take it off and get the
carbon out other times it just seems to free it self. i started using
injector cleaner in with gas and it seems to help. BTW erg vale is the
original and i think they recommend NOT to clean them in solvent.
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