my buddy has a 96 f-350 with a 5spd and a powerstroke. 229000 miles. the truck and drivetrain are in great shape. but his motor just doesnt seem like its all there. you really cant feel boost coming on till about 2 grand. we put a different downpipe on it for better flow and he has a new idm box. he did glow plugs and had the injectors checked out. all good. the guy that worked on the truck only adjusted valves on one head. (dont ask) anyway the truck has alot of potential and its under what it should be as far as power. its like its not running on all cylinders till you get to a higher rpm. any help would be appreciated. maybe a referal to a mechanic in pennsylvania close to pittsburgh.

 

Check the connections at the valvecover wiring harnesses. Make sure they are clean and tight. It may also have a clogged cat convertor.

 

bump

 

does it idle ok

 

if it idles ok it probably the intake clog like filter or like the other poster said cat converter.

 

it idles ok but it seems a little rough like the things missing or something. he did glow plugs.

 

he ran it without a filter for little bit and said there was a little difference but it was still not what it should be. cats knocked out.

 

glow plugs only work first 3 minutes maybe loose connection on injectors wires under valve cover. maybe cat con totaly pluged if i were you i get ridof cat first. elimitate that first.

 

iIRULE you telling me he don't have a cat.

 

well maby ipr valve going bad= not getting correct pressure??

 

the cats there theres just nothing inside it. its not my truck. its a friends. whats the ipr valve do?

 

injector pressure regulator= it on you oil resivoir on driver side in lower corner = it regulates the oil pressure that controlls the injectors.

 

also check the fuel pressure regulator, it on your fuel bowl top their is a screen in it it could be pluged.

 

Did your mechanic replace the valve cover gasket and the under valve cover wires to the injectors and glow plugs?
The injectors use a high dc voltage and if wires are bad its like spark plug wires on a gas eng.