My friend has an 07 3500 cc lb w/ a 6 spd e/ 35,000 on it. He has a bully dog triple dog downloader and a edge EZ module. His truck has started to misfire, so he pulled the chips, and it continued to do it. When it first started, it only did it every now and then but it is getting worse. Does anyone have anythoughts about this, or has anyone experenced it? Thanks in advance.

 

mine does it when the outside temps are low and the grid heater cycles on and off. dealer can't find out what is going on.

 

HUH ya his just does it at random times, and it doesnt do it long enough to check the exhaust manifold for cylinder heat differences. He hasnt taken it to the dealer yet, really isnt fond of the dealer, but i guess doesnt have a choice. And sorry for posting in the wrong section to everyone.