Ok everybody I have a 1995 mustang gt. 5.0 recently I have noticed a studder, problems accelerating. Also rough idling, and rpms having problems gettin passed 2000. I have changed the coil pack, spark plugs, fuel filter. Still no luck. Anybody that knows the issue help me out please..
The fuel pressure should be 30-45 psi with the vacuum hose attached to the fuel pressure regulator. It should be 40-50 psi with the vacuum hose detached from the regulator.
The fuel system should hold pressure for five minutes, with a loss of less than 5 psi from the indicated operating pressure.