996 Gauge install - gas gauge off...

[jgaude]

Hello there 986Forum folks,

I've done the 996 gauge cluster swap.. all is working well, except my gas gauge. My 996 cluster is off about a 1/4 tank of gas.. It fills fine.. but goes down too slowly. Like I'll go 250 miles on a half tank of gas.... I'm wondering if my fuel gauge is bad. I looked up the part number of the cluster and it's a C2 one... Not a turbo.. Can't tell if it's a c4 though. I'm getting into the EEPROM and was wondering if anyone knows it there is a calibration number to tweak?

Thanks!
...Joe