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I would think that if the cat was plugged it would be act the same all the time, a plugged anything doe's not change. Dave S. Please comment.
My question is will replacing the EGR valve fix the performance problem. It is about 400.00 for an EGR valve plus labor. The car runs the same when it is cold.
After I cleaned the egr valve I drove it and it was at about half performance and I parked it at my shop. I cleared the codes with the scanner and ran it but the code came back, so I turned it off and had other stuff to do. I just took it for a ride after your last reply and took it for a good ride down the highway and it ran perfect with all its power. I am assuming from this that this would eliminate the cat after heating it up that much, is that fair to say or not. I am thinking it is an EGR valve that is working intermittent . Is that a good assumption or not. Dave S.
You wouldn't happen to know where I could get a used EGR or a new one other than the dealer, the scrap yards don't seem to have any of these cars .