I have a 1996 GT and i just had the clutch replaced and two days later i get a check engine light. I had a diagnostic test ran on it and it gave me a code for EGR excessive flow. What should i check first? Should i just take it to a mechanic and let him deal with it or is it a common problem and i should just replace the EGR valve. I also have long tube headers, but i have had them for a long time, so i dont think that is the problem. But the guy who put in my clutch said he had to strap the headers out of the way to get to the tranny so he might have done something to them.