Ok here is the story. I bought this 12 valve motor to put in my 78 ford and im trying to get it going. I got every thing together and started it up and it ran fine off idle but would spit and sputter white smoke one it was revved and held at high rpm. It didn't smoke at all when reved up. So a friend of mine suggested cleaning the injectors because it had been sitting for a while. So i did and had them tested and they were better but not perfect. I installed them and it ran the same. So i orderd new injectors and installed them bt before i put the fuel lines on i turned the motor over to see if the pump was working properly and only 4 of the delivery vavles where pumpen out fuel. Could i have a clogged valve, can the be cleaned? I am new to the 12 valve so any help would be appreicated

 

welcome to diesel bombers and we will put you back up front to see if we can get a p7100 guru to help on this

 

well i think you need to get all the fuel lines back on bleed it get it running and check your fuel pressure to see where its at then you could determine if its lift pump,ofv or the fuel pump itself that is causing problems

 

thanx this seemed to be a good place to get advice. OK i will have to give that a try thanx for the advice

 

I'm fighting the same problem with my 12v at the moment. I have to check the fp yet, ofv, timing and look to see if there's any air leaks in the supply line... Let me know what u findout and I'll do the same

 

what should i do to check the ofv?

 

If ur fp is low, u pinch the rubber hose coming from the ofv to see if the pressue rises any.

 

well i can't get it start is my current problem it won't push any fuel through the injection lines so is it safe to say my lift pump is bad?

 

That would be my first guess... Crack the banjo bolt feeding the pump loose and use the priming bulb on the filter housing and see if clear fuel comes out (not any bubbles or foam) retighten and try to start it again. Could have slipped timing too?

 

ya i have done that it has fuel going into the feed, but i took the ofv off the return and there is no fuel coming out the return. could something have found its way inside and plugged the inection pump?