Out of Fuel -- 1/4 Tank

Some owners of a 2009 Chevrolet Corvette ZR1 may comment that the vehicle runs out of fuel at approximately 1/4 tank. This may be due to the right hand fuel tank internal supply and return line connections which may be loose. This condition allows fuel to be transferred to the right hand fuel tank but not fed back to the left hand fuel tank. DTCs P2066 and/or P2636 may set.

TIP: Before performing the test suggestions below, the vehicle's fuel level MUST read below 1/2 tank of fuel remaining.

1.    Scroll through the following functions using the Tech 2:
       > Diagnostics > Model Year > Passenger Car > Chevrolet > Y
       > Power Train > Transmission (Auto/Manual) > Engine Type
       (LS3/LS7/LS9) > Engine Control Module > Data Display
       > EVAP Data > Read voltage for 'FUEL LEVEL SENSOR RIGHT'

2.    If the voltage for the right sensor reads 2.47 volts or higher, the fuel line
       connections are secure. Follow published SI diagnostics for the customer's
       concern.

3.    If the voltage for the right fuel sensor reads 2.46 volts or less, there is
       reason to believe one of the fuel line connections is loose. Remove the
       right fuel tank sending unit and inspect the supply line (Fig. 18, A)
       and return line (Fig. 18, B) connections.
     

(Fig. 18)
     
4.    Secure the supply and/or return line(s) at the bottom of the fuel sender.


- Thanks to Dino Poulos