the fuel pressure regulator is located behind the drive belt close to the top
where is the fuel pressure regulator on1991 lumina 3.1 /
If its like the 1993 Lumina it's in the fuel tank.
Low fuel pressure (fuel pump, pressure regulator, fuel filter), vacuum leak, partially blocked/fouled injectors.
Not real familiar with the vehicle and not much info to go on but my guess is possibly a faulty or damaged diaphragm in the "fuel pressure regulator", which is located where the return to tank fuel line connects to the large metal fuel line that the injectors are connected to or "fuel-rail", . That is the only link between fuel system and vacuum system in a fuel injected engine that I can think of.
the fuel pressure without vacuum is 34psi. and with vacuum 43psi.
If it is a 3.1 9-13 psi.
ask a mechanic to do it for you
Stock base fuel pressure is 42 psi. This is the pressure when the vacuum hose is removed from the fuel pressure regulator. The vacuum hose must be plugged when its removed from the regulator.
It doesn't have a vacuum line attached to the fuel pressure regulator.
There is a vacuum controlled pressure regulator on the fuel rail. Check for vacuum leaks. If the unit is faulty, it will often leak fuel into the vacuum line.
Most fuel pumps on post 1980's vehicles are found in the fuel tank.
Should be in the fuel line, near fuel pump check it
Disable the fuel pump and relieve the fuel system pressure.Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.Tip: Locate the fuse box in your owner's manual and disconnect the fuse to the fuel pump. Crank the engine until the vehicle dies to relieve any fuel pressure.Disconnect the fuel line and install a fuel pressure gauge. Reconnect the fuse to the fuel pump.Start the engine and check for leakage around the gauge connections.Disconnect the vacuum hose from the fuel pressure regulator and attach a hand held vacuum pump to the port on the fuel pressure regulator.Read the fuel pressure gauge when a vacuum is applied to the fuel pressure regulator and also when no vacuum is applied. The fuel pressure should decrease as vacuum increases, and increase as vacuum decreases. Compare your readings with the value in your vehicle's specifications.Reconnect the vacuum hose to the regulator and check the fuel pressure at idle, comparing your reading with the value in your vehicle's specifications. Disconnect the vacuum hose and watch the gauge- the pressure should jump up as soon as the hose is disconnected. If it doesn't, proceed to step 8.If the fuel pressure is low, pinch the fuel return line shut and watch the gauge. If the pressure doesn't rise, the fuel pump is defective or there is a restriction in the fuel feed line. If the pressure rises sharply, replace the fuel pressure regulator.If the fuel pressure is too high, turn the engine off. Disconnect the fuel return line and blow through it to check for a blockage. If there is no blockage, replace the fuel pressure regulator.Connect a vacuum gauge to the fuel pressure regulator vacuum hose. Start the engine and check for a vacuum. If there isn't a vacuum present, check for a clogged hose or vacuum port. If the amount of vacuum is adequate, replace the fuel pressure regulator.Before replacing the fuel pressure regulator, relieve the fuel system pressure again. Disconnect the cable form the negative battery terminal.Clean any dirt from the around the fuel pressure regulator.Detach the vacuum hose from the fuel pressure regulator.Remove any bolts that attach the fuel pressure regulator to the fuel rail and remove the fuel pressure regulator.Install new O - rings on the fuel pressure regulator and lubricate them with a light coat of oil.Tighten the fuel pressure regulator mounting bolts securely.Verify this repair has been properly completed by using a vacuum gage. If the readings on the gage match manufacturer's specifications the repair has been successfully completed.
The fuel pressure regulator controls fuel pressure at the fuel injectors. It uses vacuum pressure to control the pressure. It is positioned on the end of the fuel rail. If they leak, fuel will go into vacuum line causing hesitation on start-up and the smell of gas at exhaust. Warning, Fuel is under pressure. Disconnect battery and release pressure before replacement.
With vacuum line (from fuel pressure regulator) OFF and pinched , pressure should be between 47-54 psi. With vacuum line ON fuel pressure egulator, pressure should be between 38-46 psi.
The vehicle does this on its own with a vacuum operated fuel pressure regulator.
Look on top of the engine at the inlet side of the fuel line from the fuel tanj and you will fine a Fuel Pressure Regulator. have it checked. It sound like it is stuck open. It is suppose to open and close to regulate the proper pressure to each of the fuel injectors.
The fuel pressure regulator is located on the fuel rail of the vehicle.
At idle or deceleration.
there is no fuel pressure regulator " sensor ", there is a fuel pressure regulator controled by vacuum located at the front end of the fuel rail.
There is none. It only has a fuel pressure regulator, the fuel is gravity and vacuum fed (via carb vacuum)
fuel pressure regulator on the fuel rail it will have a vacuum line on it
Plugged catalytic converter?