Quote:
Originally Posted by lionheartsails
My issue is for a 1999 Mystique, which has the same set up as a 1999 Cougar V6-2540 2.5L DOHC
I have diagnosed my issue to the Fuel Rail Pressure Sensor. It appears the diaphragm is blown. I can get the car to run fine by plugging the vacuum hose nipple and disconnecting the wiring but now the check engine light is on. I have tried Ford and every other parts house I can think of and I am unable to find a replacement Fuel Pressure Sensor.
According to Ford, the part is NO LONGER AVAILABLE and I have had no luck finding a replacement. Everyone is trying to sell me the fuel tank sensor or the fuel pressure regulator. Apparently they had 3 different fuel systems. A return system and 2 non-return systems, one mechanical and one electronic. I have the electronic system with a blown diaphragm.
Anybody have a source for a Fuel Pressure Sensor or a work around for the check engine light?
1999 Mercury Mystique V6-2540 2.5L DOHC
See Post Mercury Mystique Post for images
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Since there is no return fuel line and the system relies on feedback from the sensor to regulate the fuel pressure via the fuel pump, I would think that there probably isn't a work around to get the light off. You didn't mention if your tried looking for a used sensor. If you go on
http://www.car-part.com/ and search for your vehicle you can get a list of hundreds of results for 1999. I put in "fuel rail & misc. injection" since the sensor wasn't one of the choices. There were many complete fuel rails in the results for the V6.