Ok so a few weeks back I park my truck at work it's running fine, 8hrs later I go to leave and start it and instantly there is a terrible knocking sound, we check it out and it seems like it's coming from the top of the engine I have it towed home and I'm told it could be an injector so I borrow a set of stock injectors and change them, doesn't help at all however my adrenaline montior is flashing low fuel pressure could it possibly be the lift pump or injection pump I never upgraded either do to being broke like an idiot I still put in a chip and 150hp injectors any suggestions will be appreciated thanks guys

 

I forgot toads that it smokes white and obviously has no power also all the rockers seem to move fine

 

What kind of codes are you reading?

 

had the same issue lound knock on the top half alot of raw fuel out the exhaust. top of valve train looked good. but dropped a exhaust valve destroyed a piston. on start up not moving. you can check a few things. pull the cover turn the motor over by hand, flywheel or barring tool and check for equal valvle rise and fall. you could crack all of your injectors and bump the fuel pump and see if your getting fuel to them. but if its that loud and metalic coming from the valve cover, most likely its a hard part. if you have a bore scope pull injector and hand turn the enging and look down to the piston. good luck and I had no codes when this happened.

 

You have a VP-44 Cummins without a fuel pressure gauge???

 

may not have mechanical one but I believe his adrenaline with/pulse has a fuel pressure reader.

 

Yea I'm getting ready to pull the head off I think that's the best bet if I can get my hands on one of those long cameras and check and yea I only
monitor the fuel pressure by the adrenaline digital gauge thansk for the help

 

Hope not to be the bearer of bad news, but that's similar to what my truck did when it blew the tip of of a fuel injector into the #2 cylinder and shelled it and the piston. Just got the engine back in the truck after rebuilding it.