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: Question Paul06Duramax 10-24-2007, 08:27 AM 06 Lbz 4x4 crew---No cat or muffler, straight 3 1/2 all the way back, no codes. Bought a Diablo Sport programer and installed the 85hp and reset the Mph, no codes. Weather cooled off here in Houston and now throwing EGR code all the time. From my research here I need a finger stick and blocker correct ? saratoga 10-24-2007, 08:29 AM That would be correct. Not enough backpressure without the cat to force gasses through the EGR. LeadfootDuramax 10-24-2007, 09:43 AM Welcome to the site. Check out the regional section towards the bottom. We are having a Houston get together here in a few weeks and would love to have more people. NCMIC 10-24-2007, 10:16 AM block it and finger it. Then do the PCV reroute. Paul06Duramax 10-24-2007, 03:45 PM Ok, what's the PCV reroute? RCH 10-24-2007, 04:20 PM Ok, what's the PCV reroute? Try this link, PCV re-route is just as vital as the egr block.:D http://www.dieselplace.com/forum/showthread.php?t=66728 | ||