i Have a 1998 GT 4.6, at idle car misses. when i remove the vac line coming from the regulator i get 30 psi off my fuel rail, but when i plug that vac line my Psi jumps to 40 psi. it tends to idle much better, but still misfires when i give it throttle. please if anyone knows anything that may help, ill take anything. about to sell this car at this point.
