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I bought the tool for measurements. It?s the LT4 pump with 32 fuel lobe and LS7 lash cap

My high side fuel pressure stays good vs demanded and actual. It?s just the low side that?s erratic

Did you see some things that needed changed? I will flash tomorrow and see if it improves.

I truly hope this is a virtual torque setup issue. As it seems like most issues are with Gen V

Check valve or no check valve my low side pressure readings are moving 40-50 psi fluctuations! However my desired high side and actual are good

What did you end up doing or not doing about this. Im experiencing the exact same issue. See my last post, such an odd issue.

Myself and my buddy (tuner) have been dealing with and torubleshooting an erratic low side fuel pressure issue. I attached both and idle log and the current tune to see if anyone has some input on...

Soooooooo pulled all connectors and reseated them, but the culprit was the 6l90e plug��*♂️, good to go! Thanks for the help and I always put the fix for others.

Yes just confirmed 12V at the OBD2 port. I have dumb down the wiring so it’s absolutely simplistic for troubleshooting and I’m still getting the Detect Protocol Failure message. HPTuners sent an...

Thanks for the reply, did some troubleshooting tonight and eliminated any wiring issues. The PSI Harness conversion simply applies 12V Constant power to the ECU via the starter lug, one additional...

attempted to read a customers LS Swap 2010 Silverado 5.3 E38 and I keep getting Protocol Failure message. I attempted to hook up to my personal truck E67 ECU and had not issues, worked as advertised....

Looking for some advice on how to scale a 102 Nick Williams DBW TB.

Crate LSX 454
GMPP E67 Controller

MSD ported intake
NW 102 TB

Under my idle tables for the GMPP controller there is no...