I need help. <img src="/forums/images/graemlins/scared.gif" alt="" /> I don't need to clean the passages throughly for now as my engine needs $5000 worth of work in the near future. At that time, the upper plenum can be throughly cleaned when my lower plenum gets replaced, my valve seals get replaced and my head gaskets get replaced. <img src="/forums/images/graemlins/barf.gif" alt="" /> For now, I just want the satanic EGR passage open!!!!! <img src="/forums/images/graemlins/evil.gif" alt="" /> I used 12 ga. wire, aircraft cable, coat hangers, and finally- a piece of speedometer cable attached to a drill at 3/4 speed and all of these go in 5-6 inches into the EGR passage and then stop cold. Certainly this carbon buildup can be "broken through" with a piece of cable traveling several hundred revs per sec.?!!!!!! <img src="/forums/images/graemlins/angry.gif" alt="" /> how big is this passage opening where it enters the hollowness of the upper plenum 'chamber'? Does the passage start out large at the EGR and get smaller as it goes toward the opposite opening? I need to know --Without removing the upper plenum- how to get thru the carbon buildup so that my EGR functions properly and my "43" fault code leaves me the heck alone!!

THANKS IN ADVANCE FOR ANY HELP/INFO THAT CAN BE OFFERED TO ME (other than removing the upper plenum)<img src="/forums/images/graemlins/patriot.gif" alt="" />

-aaron

p.s. I am very frustrated with this truck right now.Would compressed air blown into the passage clear it out??