lost power 5.9 360 motor. put new plugs in new air filter. found a whole with threads in the back of in take manifold. shiny clean threads. went to the bone yard found 1 motor. but no part or fitting that would go there. found a pic on Ebay that showed a tube going from intake manifold to back of exhaust manifold. but i don't have a whole in exhaust manifold for the tube. some 5.9 had a egr valve some didn't. it will start some times. idles rough. i have no loose vacuum hoses.i got a 1/2 in plug at the hardware store. a pipe plug. put it in finger tight.threads don' t seem to be the same. don't want to strip it. i am not sure if it gets plugged up or some kind of sensor or vacuum line goes there. dealer could not help they said bring it in. i cant drive it at 2mph.i have to floor it to start. maybe some body. can send me a pic of what goes there.at hoggharley@comcast.net in the mean time. iam going to try to find a some more bone yards