recently ive run into werid problems. First my gas guage stop reading accuratley, but will read accurately if foot on the breaks. werid i know. now all of a sudden the temperature guage doesnt read correctly also. If i hit a bump in the road it will read right or slightly off and sometimes if i maintain a steady RPM the guage will stop flickering like crazy and maintain a measurment. Im almost certain it is ground problems but i dont know where the grounds would be for these sensors. Can anyone tell me where the ground is for the gas guage and for the main harness around the engine?