Hello everyone,
I have a 1994 GMC Jimmy. I just bought it a couple months ago but haven't really driven it until recently. The check engine light came on so I checked the code and it was for the EGR Valve. I read that it may run rough, which it does at idle. I also read that if there is not enough backpressure it will not work properly. There is a fairly large exhaust leak, but it is near the back behind the muffler, so I wasn't sure that could be the problem. I took it out and the slider thing on the valve doesn't move freely, but then again I don't know how it is supposed to move. But I ran the engine and unplugged the wires and it ran the same. Is it definetly the valve itself? I tried cleaning it out with wd40 to no avail. Can I get one from a junkyard? Anything else to try?

 

You could get one at a junkyard.
It definately sounds like you need a new one.

 

Or you can follow the steps in this post and clean it.

 

Mine is nothing like that.

 

What is your's like?

 

I'm an idiot. It wasn't even the egr valve i took off and cleaned. Mine is just like that.