I am having an issue starting the 2009 Pontiac G8 LS Swap. The engine will turnover, but will not start. I have 12v on each fuel injector and ignition coil, as well as the external fuel pump, in the on and key on position. I have wrote entire, using the detailed instructions from the HP tune 101 help. I changed the crank sensor. I have an American autowire vehicle harness and PSI engine harness. I checked all fuses and they are good. I have the PSI harness and the cab grounded to the back of the head. Frame and cab has a ground strap connection. The battery is grounded to the front of the head. I updated the VCM Editor (beta) to the latest version also. Any help would be greatly appreciated!
If it's a no-start because of lack of fuel, it should run as long as you keep spraying it, and run well enough that I have driven cars with dead fuel pumps into the shop from the back lot on nothing but toots from a can of brake cleaner through a long hose up to the TB inlet.
Wouldn't it be a bummer if you replaced a good working sensor with a new junk one that doesn't work, by throwing parts at it at random? That'll be fun to figure out later.
Never create more unknowns for yourself when you already don't know why it doesn't work.
Lol. It does make sense. I checked the fuel pressure with the kit and it reads above 60 psi. VCM scanner shows fuel pressure at 58 psi and I also noticed no RPM still. Crank request said “no” and starter relay said “off” ?
In a swap without all the other modules the factory used in the original vehicle you should have the starter fault checks disabled, so those channels should read no/off. This is an engine FROM a G8, with an aftermarket harness, installed in some other vehicle, right? And not a 'swap' in the sense you put a different engine IN a G8?
OS tab: Starter Fault Checks: set to DISABLED, then write entire (not write calibration)
System tab: Starter Diag: set to DISABLE
set DTCs to No Error Reported:
P0513
P0615
P0633
P1631
P3400-3457 - the DOD codes
U0121
and maybe others.
Other codes, I don't know what all hardware you are using and have connected, like brake switches and fuel level sensor. If something is no longer there and you don't want the ECM to keep looking for it, codes must be set to No Error Reported. No MIL Light means it will still run the associated diagnostics.
Looking at the tune file can only tell you if VATS was disabled before the last save in the Editor, it can't tell you the VATS state as it exists in the ECM unless a new read was performed after the write, and that new file compared to the one that was written.
Thanks for your patience. Just got home from work and about to get started on this again. I’m about to change these things to no error reported. I disabled the VATS. I will read the ECU to ensure the VATS are actually turned off.
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