Truck will turn over but wont fire. No smoke from exhaust pipe and 15 psi going into injection pump. Only code it shows is a p0237 low voltage to boost sensor. I pulled boost sensor and cleaned it and reinstalled it and also unhooked the tst wire from it. The truck ran fine before this i just shut it off and now no go

 

Have you tried spraying fuel (wd40) into the intake, or turbo?? Are you sure you didn't run out of fuel just kiddin... What kind of volumn do you get out of the lift pump? Pressure is one thing, but if you don't have volumn, you won't go anywhere

 

Yea I'm not out of fuel I had good volume comeing out ot my filter housing. Is it possiable that the low voltage reading from the map sensor is throwing off the ecm and causing it not to start? Or is it my injection pump?

 

Have you loosened some injectors to see if they spurt while cranking? If you have good pressure, then you will have a sufficient amount of fuel. I wonder if there's a chance you're getting air in the system some how..

 

We have to ask all the obvious. Are you sure your batteries are fully charged and they crank motor at good speed ? MAP sensor has no influence with starting motor.

 

I tried the truck this morning and it started right up I have no idea why I havent done anything else since yesterday.. And yes the batteries are fully charged. I dont think that I was getting any air in the system it was like the injection pump wasent letting fuel into it.