Thanks for all the replies. The pump is a ambac. There was a air line from the pump over to the puffer. I plugged it at the at the pump and on the top of the puffer. This truck only smoked, before, when you poured the the coal to it......now it smokes all the time rolling down the road. It was working fine and everything that I have mentioned that I have tried is after this. The muffler rotted out so I replaced it with a straight pipe. The hood rubbed a hole in the air to air exchanger, 1st I j-b welded it but broke off.....so I thought it might have got sucked into the turbo.....thats why I checked the turbo.....turns nice, got a piece of hose and gasket glue over the hole now. The diesel injection shop says it sounds like lack of air getting to the engine.....thus the reason for black smoke, so if the intake gasket was blown would this cause this problem ?? The maniflold pressure goes up to 18 #s if I hammer on the throttle. Would a collapsed fuel line cause for a drop in fuel pressure ?? Thanks in advance for any ideas Byron