The three modules Russ was talking about are the EGR valve, EGR-BPT, and the EAI V. I tried cleaning my EGR valve, but I found that in the long run it's better to just replace it. Same with the BPT and the EAI V. Cleaning works for the short run, but eventually you'll have to replace them. Also the best way to clean your EGR pipe, initially, is to remove the pipe and then clean it out with some solvent.
Also when you clean/replace your EGR valve buy a new OE gasket for it. You'll see what I'm talking about when you take yours apart.
Also, don't forget to clean out your throttle body.
Also when you clean/replace your EGR valve buy a new OE gasket for it. You'll see what I'm talking about when you take yours apart.
Also, don't forget to clean out your throttle body.