i have a 99ctd and 3 times when i have filled up the diesel fuel tank and started the pu, the fuel gauge reads empty, after turning the motor off maby 3 times the fuel gauge reads full as it is supposed to read, my question is,,,,, is there something wrong with the key switch or is there a relay in the fuse box that would cause this to happen. im not wanting to drop the tank and find out later that it was someyhing so simple .