StellarZ

I just got my car to start after 4 months of not starting after a new motor install. Come to find out the injectors that I had rebuilt were actually **** and I replaced them and the car fired right up. The problem is that now none of my gauges work. The tach, oil pressure, odometer and temp gauges work until the car starts up. Once the car starts up all of the gauges go haywire. The oil and coolant shoot straight up to the top, the tach plain does not work and the odometer screen goes blank. Any ideas? Bad ground? I need help. The car does not run very well either. I need major help. THIS THING NEEDS TO START RUNNING!!