i have purchased a set of autometer electric gauges (covan kit) i had the gauges working fine before i tore the old motor out and went from carb to tpi. now it seems that the oil pressure gauge isnt working. i switched the sender and went with the stock sender for the tpi. if you look at the gauge it stays pegs at 100psi and doesn't do anything. you turn the key on and it doesn't move. i took it out of the car and the needle stays at 100psi. is there any way to test the gauge to see if it still works or did i mess it up. any help would be great. thanks