Engine light is on and I've been told that the fuel rail pressure sensor needs replacing. Is this harmful to the car and what is the cost?
If it is a 4.6L V8 or a 4.0 V6 engine, the ford part number is 9F927. The price according to fordparts.com is $181 and that is list price just for the part and does not include labor to install the part. Have you had the Error codes pulled from the ODB II port? if not, you need too. The codes could tell us what part of the sensor is a problem and help tell exactly what the problem might be. The sensor could have a broken wire going to it causing it to light the "Check Engine Light" (or CEL) and the sensor could be fine if the wire is repaired.
I don't have a ford explorer but MOST fuel injection systems by using fuel to cool the injectors and the injector is given more fuel than it needs to run the engine. Any fuel not used by the injectors for combustion is returned to the tank and the fuel is placed back in the tank to be used by the fuel system again. If the fuel pressure regulator is controlled by the fuel pressure sensor and the injectors are injecting more fuel for combustion, you could be running rich and your exhaust will be very black and sooty at the tail pipe. Come back with the CEL Code and maybe we can find out more about the exact problem with your car.
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