CAMARO6 - View Single Post - 2019 SS CCM Low Side Fuel Pressure Erratic

Chrome383Z · 07-26-2022, 04:30 AM

Has anyone seen this and found a fix? In the process of tuning 93 will be moving on to E85 soon.

Low side fuel pressure either reads or it doesn’t. MPVI2 HP tuners. It’ll read sometimes and be spot on but 80% of the time it just reads zero. I talked to Ted who is tuning the car and he has seen it before, believes it is a HP Tuners PID issue.

Concerns me moving to E85 as that’s a leading indicator before high side drops. All I have reliably now is high side pressure.

It did the same thing when I was tuning for bolt ons with GPI a year ago, but fuel wasn’t a concern then.

I actually replaced the low side pressure sensor when I installed the LT4 pump with a new AC Delco unit. No difference. Which makes sense because if it wasn’t reading I’m sure I’d get a code. So I don’t believe it’s a sensor issue.

I’ve tried logging without the wideband in the middle (HP tuners directly in OBD2) and no difference.

I’m about to throw a sensor on after the flex fuel and try to data log that way, but would prob require HP Tuners Pro which I don’t have to bring additional analog or CAN inputs.

Anyone else seen this or have a resolution?

07-26-2022, 04:30 AM	#1
Chrome383Z Drives: 2019 Camaro 2SS Join Date: Aug 2020 Location: McCordsville, Indiana Posts: 622	2019 SS CCM Low Side Fuel Pressure Erratic Has anyone seen this and found a fix? In the process of tuning 93 will be moving on to E85 soon. Low side fuel pressure either reads or it doesn’t. MPVI2 HP tuners. It’ll read sometimes and be spot on but 80% of the time it just reads zero. I talked to Ted who is tuning the car and he has seen it before, believes it is a HP Tuners PID issue. Concerns me moving to E85 as that’s a leading indicator before high side drops. All I have reliably now is high side pressure. It did the same thing when I was tuning for bolt ons with GPI a year ago, but fuel wasn’t a concern then. I actually replaced the low side pressure sensor when I installed the LT4 pump with a new AC Delco unit. No difference. Which makes sense because if it wasn’t reading I’m sure I’d get a code. So I don’t believe it’s a sensor issue. I’ve tried logging without the wideband in the middle (HP tuners directly in OBD2) and no difference. I’m about to throw a sensor on after the flex fuel and try to data log that way, but would prob require HP Tuners Pro which I don’t have to bring additional analog or CAN inputs. Anyone else seen this or have a resolution? __________________ 2019 Shock 2SS A10. 2650@10psi/LPE HPFP/XDI+30/LT4 LPFP+JMS/Soler 95mm/Rotofab, E65, CSP 2” Headers/GESI GenII Cats. MM Wild/GM SG3 suspension/1LE Brakes, Velgen VF5 Wheels/GY SC3. JRE Tuned. Last edited by Chrome383Z; 07-26-2022 at 04:40 AM.