2012 camaro calibrating fuel level for fuel cell??

[S2H]

can anybody tell me what each value is actually doing???

meaning...
what do the primary and secondary volume sender % numbers mean...


I need to configure it all so that it works with one sender instead of two,...


I have changed the sender type to single....
but I cant ever get it to read empty and full ...
I can get either empty and 3/4, or full and 1/2 tank...

sender is a 40-240 ohm sender
tank is 16 gallons


basically I need to know what each table actually means...
Primary Volume...and Primary Volume Gauge

and do I need to change values in the secondary table even though I'm setting it to single instead of dual senders.

[schpenxel]

If you can post the tune that would help.. I can only look at mine.

I have an idea on how to make it work, or at least something to try.. I had to kind of figure this out on mine because the sender I'm using works backwards than the original one

[S2H]

Long story short...
since there is no real explanation of how the gauge stuff works, I had to just sit down and pluck thru it until I sorted it out myself

I noticed that in the scanner, the sender showed 0.71v to 2.75v....
so at least I had that to go by for a sender reference

the solution that works... is Lying to the ECU and telling it the tank is double capacity...but the gauge only measures the amount you really have
then calibrating the primary to match your desired fuel tank curve
you also change the sender type to "Single", it makes it not care about the secondary fuel volume tables...
but you still have to program the primary based on the voltages you see in the scanner...
if you see 0-5v range, then you can use the full 100% of the table
in my case, its about 50% of the voltage range....so I had to start at 50% in the table
in my case... 16 gallon fuel cell....
and a 40-240 sender

so it needed to be setup so that 50% of fuel remaining (50% of 32g capacity) was full, or the Zero value
and empty ended up about 15% used on the table for the needle to line up correctly

notice..the tables are actually based on fuel used, not fuel remaining
so the left side of the table, where I have 16's, is 16 gallons USED(empty)
and I offset the Gauge volume by one cell so that Empty on the gauge was actually still a little bit left in the tank (safety margin)

[schpenxel]

Interesting.. good to know!