Yes there is a Sensor it is call A boost sensor, it adds and releases Pressure to the fuel tank as needed,there is a molded plastic line leading from the Fuel tank to a /The Valve on the engine. You should have a Vacuum line Chart in the engine compartment that will give you the Approximate location of the Valve
SOURCE: ford 1998 windstar 3.0l, when open
HAVE EVAP SYSTEM CHECKED. YOUR FUEL PRESSURE SENSOR NOT WORKING.CHECK THE CANISTER FUEL VAPOR HOSE AND INLET PORT FOR BLOCKAGE OR COLLAPSED HOSES.CHECK CANISTER PURGE VALVE HOSES FOR KINKS.HAVE CHARCOAL CANISTER CHECKED MAKE SURE ITS NOT GAS SOAKED AND PLUGGED. THE DEALERSHIP HAS TO RUN A DIAGNOSTIC TEST TO CHECK OUT WHOLE EVAPORATIVE EMISSION CONTROL SYSTEM.
SOURCE: 1990 f150 truck cranks up but got to press gas
Have you checked for a vacuum leak? Be suspicious of the solenoids you see with vacuum lines going to them. I think it has 3 or 4 of them. don-ohio
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