Got an 03 GMC sierra that will spin over but wont start. Only code showing was a security code for no fuel P1626. I disabled the vats through hptuners and still wont start. It has 55-60psi while cranking and has spark at the plugs(only checked 3 plugs). Plug fires at the same time as compression hits. Wont hit a lick on starting fluid. With a test light the injectors show to be firing. Any ideas what to do next? Think it may still be a fuel problem but no idea where to start checking. Also the key is hard to turn sometimes. Does disabling vats in the tune not get rid of all the problems associated with it?

 

Post the tune. You can also log in HP Tuners to see if VATS is actually disabled.

I believe there are some codes to disable but I can't remember which ones.

 

I'll have to wait till this afternoon to log and see what it says about the VATS status.

 

The VATS status shows pass so I assume its still not disabled for some reason. Am I missing something in the tune? Do I still need to do the resistor mod to the key switch?

 

if its vats related, the engine wouldn't crank at all.

 

you got fuel pressure? pump should prime for a few seconds with the key in run, then turn off. should go back on after you crank it over.