2002 C5 Corvette - passenger gas tank removal - gas tank gauge issue

[Crazy Legs]

Hey everyone!
In my 2002 C5 I'm trying to remove even more weight and I removed the passenger side gas tank, sending unit, and transfer tube & lines.

In my tune (HP Tuners) I made both "Capacity & Primary Capacities" read 9.64 and "Zero'd out" my "Secondary Volume" table as well as shut off the 3 Errors I was getting.
Whether the drivers tank is fuel or 1/2 full the gauge reads 1/2 full..... So I then tried a few other things inside the tune but no matter what it'll just read 1/2 full -- I need some help guys

Obviously the goal is for the fuel gauge to read accurately with just the drives tank.

Also, I know everything is correct as far as the plumbing and wiring, this just came off the dyno and it made big power with the prototype intank (3) 450L pump by Andy from Squash. I just need the gauge to work correctly.

[danny smith]

I can't help you the programing but I maybe able to help you fool the factory pcm to read half full on the gauge then go down from there. I found your post as I am reading and trying to teach myself how to program. let me know if want help. I have ben repairing fuel gauges for a long time. you may need to wire in at least one resistor and make sure your other sending unit has the right gauge sweep. Danny gm master tec.

[Daveq]

Hey everyone!
In my 2002 C5 I'm trying to remove even more weight and I removed the passenger side gas tank, sending unit, and transfer tube & lines.

In my tune (HP Tuners) I made both "Capacity & Primary Capacities" read 9.64 and "Zero'd out" my "Secondary Volume" table as well as shut off the 3 Errors I was getting.
Whether the drivers tank is fuel or 1/2 full the gauge reads 1/2 full..... So I then tried a few other things inside the tune but no matter what it'll just read 1/2 full -- I need some help guys

Obviously the goal is for the fuel gauge to read accurately with just the drives tank.

Also, I know everything is correct as far as the plumbing and wiring, this just came off the dyno and it made big power with the prototype intank (3) 450L pump by Andy from Squash. I just need the gauge to work correctly.