I've got a 86 5.0 fox body with fuel injection. After driving the car here locally the car will not crank after setting. I ?have to spray starting fluid down the intake to get it running again. Just replaced the fuel pump and noticed the tank was pretty nasty. I cleaned it out but probably should have got a new tank. Am I losing fuel pressure when it sits? Possibly a fuel pressure regulator? What's my first step. Thanks for any input.