I'm not sure if your scan tool has the ability to run the tests needed to help pin point the problem. You need to read your rail pressure while cranking the motor to see what it is at. I believe it is supposed to have atleast 5500psi for it to start.
ECM/FICM needs to see at least 10 MPa (1,450 psi) in order to fire the injectors.
Scanner is a snap on, I was told each number is mpa? X 145 so 43 X 145 =6235 psi my reading of 2 would be 290 psi ..that not being in the range of operation needed, the injectors will not get any signal to fire...if I understand correctly. I have searched through tons of threads hoping to find someone who has encountered the same or close so I don't throw parts at it unnecessarily but every case has a different twist and I have yet to find any place that can bench test parts as I live 60-70 mi from service. Oh and electrical ..nothing except my dash panel goes out after running for a while but only after I shut it off, then restart, they don't come back on for a while if everything is good and warmed up...one time drove about 60 mi before they came on. Never had them go out while driving.
Demand at startup should be around 43 MPa but if you're making only 2 then something is definitely not right.
1) Fuel supply issue (run a temp clear vinyl line between filter head and FICM, then look for air bubbles)
2) Injector returning too much fuel (check your fuel return line while cranking, if fuel is gushing out you have an issue)
3) Bad FPR (need to replace to verify issue)
4) CP3 pump toast (you can have it tested but I would suggest to just replace since it will include a new FPR as well)
5) Bad rail pressure sensor
6) FPRV not holding pressure
2005 Silverado EC/SB, LLY, 4WD, EFI DSP5 V2 (Idaho Rob at ATP), Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein 5100's (Norcal), Cognito UCA's, 17" NBS alloy rims, 265/70R17 Michelin LTX M/S2's, Pioneer AVH-P3200BT, CubbyCam Backup Camera, Pop & Lock Power Tailgate Lock, Extang Solid Fold Tonneau Cover, Tekonsha P3 Brake controller, Alphatherm AT-38OD Washer Fluid Heater
Last edited by MTL_Dmax; 08-01-2013 at 01:50 PM.