2004 columbia mbe4000 power problems

Pre egr

 

Now this i know for mbe4000 engine.. i dont know about others,since when mbe came to USA market something about grandfather rule....

 

Okay, you confused me with your first reply since it seems to indicate trucks built before 04 were the ones non egr.

 

Look on the exhaust side of the engine. The EGR engines have a tube that curves up and over at the rear of the manifold, then runs toward the front of the engine above the manifold. Also the pre-egr engines will get 6-7 mpg while the egr engines get 5-5 1/2 mpg.

 

Does anyone know why you don’t have oil pressure what could cause that