The tell tale sign of a vehicle that is running too rich is that it’ll have black exhaust smoke.

Black Exhaust Smoke – One of the most common symptoms of a vehicle that has a bad fuel pressure regulator is that it’ll run rich.

Most of the time, when there is a fuel leak, it’ll be accompanied by the sharp smell of gasoline. Beside the loss of power and fuel economy that this can cause, it’s a big safety hazard.

Leaking Fuel– If any of the seals in the fuel pressure regulator fail, or if the diaphragm fails, raw fuel will begin to leak.

Without a proper air/fuel mixture, the engine may run rough, misfire, hesitate, or fail to start at all. Either way, this wreaks havoc on the air fuel mixture.

Misfire– When the fuel pressure regulator fails, it can allow too much or too little fuel into the engine.

Here are a few of the most common symptoms of a bad fuel pressure regulator: A Typical Fuel Pressure Regulator Bad Fuel Pressure Regulator Symptoms: Ford ExpeditionĪ bad fuel pressure regulator can put your Ford Expedition out of commission.

Too much fuel pressure can ruin injectors. It also saves wear and tear on the injectors themselves. Think of it like a damn with a river of fuel behind it. It properly controls the amount of fuel entering the fuel injectors, intake, and combustion chamber. Keeping consistent pressure to the fuel injection system is vital to the efficient operation of any engine. Your Expedition ‘s fuel pressure regulator controls the pressure of the fuel before it hits the fuel rail.

The symptoms of a bad fuel pressure regulator are similar to a bad fuel pump or bad fuel filter. Before purchasing a new fuel pressure regulator, it’s a good idea to check and make sure that it’s the part that you need to fix your Expedition. If you think that you may need a fuel pressure regulator for your Ford Expedition, they are relatively affordable.įuel pressure regulators in general are easy to get to, although the difficulty reaching them will vary by model year and the engine equipped. Some may be in the fuel pump assembly, but this is rarely the case (although it is happening more and more).įord Expedition Fuel Pressure Regulator Cost Most modern vehicles have the fuel pressure regulator mounted on the fuel rail. A bad fuel pressure regulator can cause all sorts of problems. One of the most common issues with any vehicle, including the Ford Expedition, is when it has fuel pressure regulator issues.

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