i had to adjust my fuel sending unit to read pretty close to accurate full levels,all sending units has to be adjusted to read full,if not everyone you buy will go way past full mark.
How bend the rod?
Yes, bend the rod and possibly the stops at either end if needed...I usually hook up the sending unit under the car{out of the tank} and run it through it's range of motion and watch the fuel gauge..As other's have stated you want the low end to be somewhat accurate if you miss it make sure you have a few gallons in the tank at empty not run out before...
