Zippydoda

Hi guys I've problems my firebird isn't starting it cranks and the speedo goes up on its own to 40 mph and the fuel pump relay wax clicking rapidly then j had a permanent 10volts at the prime on the fuel pump relay so I changed the batter and cables as found a bad earth/ground I've got a spark and if I bypass the fuel pump relay have fuel but still no start so now no voltage at the relay apart from battery 12volts and no voltage at prime but got permanent ground even with the ignition on I'm confused 😕 it's a 1997 3.8 v6