Last thursday my truck died it was no pressure to IP so i changed the LP and tried to prime the IP but it wouldnt spit a drop of fuel so i checked the check engine light it showed the 1688 inturnal IP falure then i went and bought a IP on mon and installed it that night when i tried to prime the IP i do get fuel now but dont know if it is enough still wont start does any one know what the problem is could it be bad IP instaled or crank position sensor cant figure it out i also cleared the codes and hasnt turned back on



2000 just a stock truck no mods

 

Well, since you have a new LP & IP, crack injector lines 1, 3 & 5 until fuel comes out, then repeat with 2, 4 & 6 - now you're bled!

 

That should do it. Hopefully it will fire up after bleeding 1,3 and 5 because 6 isn't fun to get to. A 19mm or 3/4" crowsfoot is what you need for #6.

 

i have already tried that i had feul with air come out then all fuel but it looks like not enough pressure could the crank sensor stop the ip from creating high pressure will check engine codes show up if the truck does not start