i just installed my walbro 255 fuel pump and everything works fine, except the car doesnt like to start right away. if i crank it, it will turn, but it doesnt start. if i turn the key from start to on, it still tries to start. i have to turn it back to acc for it to stop. i tried holding my foot on the gas, but it didnt help. after a couple tries it starts. can anyone help me please???