What Happens When the Fuel Pressure Regulator is Faulty

One strange problem that is fairly common in Chevrolet Malibus made in the late 90s is that the car acts like it is flooded right after you add gas to the car. You will have to press the gas pedal down as you start the engine in order to get it to start. The reason this can be an important problem, and one that many people don’t notice at first, is that when this is happening usually the gas mileage becomes terrible. The common cause for this is a faulty fuel pressure regulator. The fuel pressure regulator is a small cylindrical object connected to the fuel rail This is the last part of the engine which gets the fuel. It has a vacuum hose attached and provides the extra pressure against the spring. During acceleration the fuel that enters the regulator is accelerated. This keeps the engine pressure at the ideal and keeps the motor running well. There are other symptoms of this that you may have noticed, and it’s not very hard to take care of if you have a Chevrolet Malibu repair manual . The first things you want to check to make sure this is the case are the tail pipe and the spark plugs. Both of these will have black soot on them if the fuel pressure regulator is having problems. If there is gasoline coming out of the tailpipe you will immediately want to move into the engine to look around in there. Disconnect the vacuum hose from the fuel pressure regulator and check if there is fuel in the hose. If there is, you can end your search for symptoms now and make sure you schedule some Auto repair , either taking the time yourself or with a professional. It is possible for there to be no fuel in the vacuum hose and have the fuel pressure regulator fail, but it happens less often.