LS3 Fuel Pressure Magnuson Heartbeat

[greg666]

I have a 2106 Holden Commodore SS LS3 6.2 with a Magnuson Heartbeat 2300, running 90 mm pulley 7 psi, fuel pressure is dropping to 330kpa in the higher rev ranges but it should be 400kpa , is the fpcm fuel flow rate value right or do i need to increase that or do i need a fuel pump booster?
Please find attached files

[blindsquirrel]

https://forum.hptuners.com/showthrea...l=1#post673286

[greg666]

https://forum.hptuners.com/showthrea...l=1#post673286

I doubt if that pid is wrong, i have previous logs before the supercharger went on and the pressure never went below 390kpa at 6000 rpm

[blindsquirrel]

Oh. Well never mind then.

[hjtrbo]

Yep, continue on your way.

[hjtrbo]

I doubt if that pid is wrong, i have previous logs before the supercharger went on and the pressure never went below 390kpa at 6000 rpm

Bet you weren't at 107% duty cycle either.

[Alvin]

Log fuel pressure sensor voltage to see if we can catch it not matching what is reported.

Also.. in the FPCM there are some useful pids like pump PWM %, short and long term pump trims. So if you are short on fueling in your FPCM you'll see it show up there.

[greg666]

Log fuel pressure sensor voltage to see if we can catch it not matching what is reported.

Also.. in the FPCM there are some useful pids like pump PWM %, short and long term pump trims. So if you are short on fueling in your FPCM you'll see it show up there.

Ok i will have a look at those pids see if i can see anything there, thanks