I am kind of wondering cause the PCM is not seeing a "crank request" that it isn't energizing the coils or the injectors...
I am kind of wondering cause the PCM is not seeing a "crank request" that it isn't energizing the coils or the injectors...
You could set the EFILive scantool up to look at the injectors and coils and see what they are doing.
I did and they don't change at all while cranking..
Seems like this is an issue with the 07' 5.3 Silverado's. On my "M" code engine the ECM starter enable wire powers the starter relay trigger, it does not ground it as you would expect; so I ran it through an 80 ohm resistor to ground.
With this wire left open I would get spark but no injector pulse.
Just verified 12V on 19,20,47 on C1 of PCM with key on and while in crank position..
Trevor
tk-mpl,
Just to cover off the simple stuff. You have applied the VATS Patch in the calibration and done the necessary full-flash, correct?
Andrew
EFILive Crew