Help!! Truck Wont Start

04gmcdmax

New member
Jan 24, 2009
42
0
0
Brooklyn Hts. Ohio
i just replaced a lower valve cover and an injector on my 04 lly and the truck wont start were getting a fuel rail pressure too high code and when the scanner is on the vehicle the fuel rail pressure reaches 26,000 psi when cranking does anyone know what is causeing this? thanks
 

jmar243

07 lbz
Sep 20, 2009
23
0
1
pa
check the wire for your regulator on your cp3 pump
i think when there is not power to the regulator it goes to max opening or max pressure


if that looks ok try pulling the fuse on your fass pump
 
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