Hi, I have a newly aquired 95 Jimmy. Couple of days ago it really lost power, etc. Took it to the dealership, they checked the codes, pulled the EGR and dumped a goodchunk of carbon ot of it. Ran fine for 2 days but now it is doing the same thing. They showed me the EGR and I can pull it and clean it myself. My question is, How can I get the carbon cleaned out that is causing this recurring problem? Any fuel additives out there that will help? Do I need to pull the exhaust or something and chip it out? Any help would be appreciated. Thanks.