I have a 1998 Ford Contour with the 2.0 engine and when I shut the engine off, the fuel pressure quickly drops to zero. I have 32 psi running and 40 with vacuum disconnected. I read where it should maintain a pressure of 26 psi for 5 min. after shutting the engine off.
Do I have a bad fuel pump (check valve?), pressure regulator, injectors leaking into cylinder (is this possible?) or something else? There are no external signs of leaking.