Want this question answered?
The 1974 Chevy truck has a mechanical fuel pump with a built in pressure regulator.
The only things attached to the fuel rail are the fuel injectors and the fuel pressure regulator.
It is a non serviceable part of the fuel pump in the tank.
look in your owner's manual
Its round it has one line coming in one going out.
it depends on the manufacter date. 5-3-99 had a fuel regulator with a fuel return, after 5-3-99, no fuel regulator, returnless fuel system. if it is flooding, look at the fuel pressure sensor bolted on before the injection rail, fuel line go's to it and has one vacuum line and one plug in.
If you look at it you will see a vacuum line hooked to it, while the engine is running unplug it and the engine sound should change. If it don't then the regulator is bad. You can also hook up a fuel pressure gauge to the fuel line and read what the pressure is while engine is idleing and then unplug the regulator and the fuel pressure should go up a few LBS. If not replace regulator.
The pressure regulator is part of the assembly, that round thing on the top of it, where the fuel line connects. YouÊneed to crawl under the truck to take a look, if there is a fuel leak it would smell all the time.
All Fuel Pressure Regulators are usually attached to the Fuel Rail. In any case, they have a return line to the fuel tank. On your engine you may have to remove the pretty "Plastic Cover" that covers the top of the engine to see the fuel rail and the pressure regulator. Look for a "tube" that has fuel injectors going from the bottom of it and into the top of the intake manifold. The fuel pressure regulator is a round looking device attached to the end of the fuel rail with a small fuel line coming out the botttom and a vacuum line attached to the top of it. At least in most cases this is what it will look like. Especially if it an OEM set-up. Aftermarket set-ups will differ. TommyTrouble
You won't see it unless you remove the upper intake manifold. It is attached to the bank of fuel injector poppets (aka, the spider).
No. you may want to look for a restriction or a fualty pressure regulator.
yes it is a round chrome unit with a rubber vacuum hose mounted on fuel injector rail under intake I think on drivers side ,look for the 2 quick connect fuel line fittings and follow fuel feed rail that connects and feed fuel to injectors if fuel leaks out this rubber hose regulator have a bad diaphragm If it holds 18 inches of vacuum and fuel pressure raises about 10 psi regulator is god as long as you have about 30-35 psi fuel pressure