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Whole assembly at www.fordparts.com. They will send it to nearest ford dealer. Got it in about 3 hours.

Finally figured it out. Broke down and bought a brand new motorcraft pump for $400. Found out the last 2 pumps that were put in were about $200 each (Airtex). It holds pressure now and starts like new. Thanks for the ideas everyone.

Replaced the pump and no longer drops and start right up.

I answered my question with a new motorcraft pump in my car. No longer drops pressure. It appears as though this is not normal afterall.

No leaks I can see. Difficult to fully check injectors for leaks. The pressure drops to zero in 1-2 minutes after shutting off car.

When measuring the pressure in my 99 stang, it drops down to zero pressure 1-2 minutes after shutting off car. Is this a problem or normal. It runs around 30-32 psi.

I have been experiencing rough starting. My fuel pressure drops soon after turning the car off. Is this normal in a 99 mustang v6?

I have a fuel pressure issue in a 99 mustang v6. I have replaced the fuel pump and filter twice without change in symptoms. The problem is the car starts hard (long crank before fire). Fuel pressure is at 30-40 psi when running (never an issue with running). When I finally get it started I...

Stabilizer with a full tank of gas to protect the pump. Otherwise nothing else. Why do you ask?

I have had an extensive issue with my 99 mustang v6 over the past 3 years. Three years ago, upon taking it out of storage for summer, it would not start despite the use of stabilizer. The fuel pump was fried. Had it replaced and it was starting. Within the first month, it was starting hard...