E38 fuel level sensor calibration
One thing I didn't care about in my swap (2007 5.3 LMG in 1997 2dr 4wd Tahoe)
is the fuel level sensor. I had to built a new connecting rod for the level sensor, 'cause the '97 Tahoe's gas tank is a lot deeper than the 2007 composite tanks.
I also had to modify the fuel pump module to fit that deep tank.
http://i301.photobucket.com/albums/n...m/IMG_3524.jpg
http://i301.photobucket.com/albums/n...m/IMG_3527.jpg
http://i301.photobucket.com/albums/n...m/IMG_3531.jpg
http://i301.photobucket.com/albums/n...m/IMG_3533.jpg
The manual states 40ohms resistance for a full tank and 250 ohm resistance for the empty tank. The E38 sees 5V for the empty tank and 0V for the full tank. In my 1997 Tahoe gas tank I could manage to have 250ohms empty and 50ohms full.... not exact but close to the spec.
Then I looked up the calibration in EFIlive : There is F0504 which is the tank capacity in liter and F0505 as sensor calibration.
I have F0504 113l. When I read those values with the scan tool:
http://i301.photobucket.com/albums/n...sensor_pid.jpg
I recieve 0.8V for a full tank. Seems ok so far but what seems strange to me is I read 99l as Fuel tank rated capacity GM.FTRC although I programmed F0504 113l in the tune tool.
http://i301.photobucket.com/albums/n.../tank_size.jpg
any ideas? Did I miss something?
best regards from Germany
Harald
fuel sensor setup 2007 Tahoe
good question...
I am using the following VIN of a 2007 Tahoe as data source.
The ECM, TCM, BCM, Cluster and TCCM are updated via TIS to the latest tunes based on that VIN
1GNFK13037R238413
As far as I know a Tahoe only uses one fuel level sensor but I am not 100% sure..
Harald