i have a 01 i had a superchip on there i took it off and about two weeks after i took it off one morning i went outside to start my truck and the wait to start light didnt come on i tried to start it it wouldnt hit a lick and my fuel pump wasnt comin on i have a fass 150 so i thought the relay was shot so i tried to straight wire it and it worked but the truck wouldnt start the next day i went out there the light came on and it started it ran for a week or two then it done it all over wouldnt hit a lick so i left it alone then about a week later it started i drove for about 150 miles never missed a bit or nothing it just died and now i am confused could some one help out here i hand friend put a computer on it it wouldnt connect with computer could it be my ecm

 

read this link, there are some tests you can do, and troubleshooting.

http://www.bluechipdiesel.com/vp44diagnostichelp.html