Where is the fuel pressure regulator on a throttle body?
Where is the fuel pressure regulator on a throttle body?
The THROTTLE BODY housing, like a carburetor body, bolts to the pad on the intake manifold. It houses the metal castings that hold the injectors, the fuel pressure regulator, and the throttle plates. The throttle plates are located in the lower section of the body.
How does a GM TBI 300 fuel pressure regulator work?
Once fuel pressure is relieved, loosen the Torx screws holding the top on the fuel injector pod. After all screws are loosened several turns, work the top loose from the gasket. If you are working with a TBI 220 unit, you will have two injectors and two gaskets. A TBI 300 unit has one injector and two gaskets.
How to test the fuel pump on GM TBI fuel systems?
One method involves removing the fuel filter and using an adapter, that has a Schrader valve on it, in its place. You then connect your fuel pressure test gauge to this adapter. The other method is to use an adapter between the throttle body assembly and the pressure line.
Is there a fuel pressure regulator on a GM Truck?
GM seems to have no set fuel pressure as those who have performed this mod have all had varying fuel pressure settings from the factory. Now you will have to dissasemble the fuel pressure regulator. There are four torx screws holding the cup to the injector pod “roof”.
How do you adjust the regulator on a TBI?
Adjust the regulator spring disc position to the same point as your original marks to begin with. Reassemble the regulator to the TBI unit in the revers order of disassembly. If there is any question about the integrity of the gaskets, replace them. Connect the fuel lines if removed and operate the fuel pump to test the system for leakage.
What should fuel pressure be on a TBI fuel injection system?
Fuel Pressure is critical to the operation of a fuel injection system. Always check to insure that you have the proper fuel pressure. Fuel pressure should be a constant 10 – 15 PSI on a TBI fuel injection system and is typically around 12 – 13 psi. Higher pressure than 15 psi indicates that there is an issue with the installation.
GM seems to have no set fuel pressure as those who have performed this mod have all had varying fuel pressure settings from the factory. Now you will have to dissasemble the fuel pressure regulator. There are four torx screws holding the cup to the injector pod “roof”.
Where is the throttle body fuel pump located?
As you’re already aware, the throttle body fuel injection system on your 1987 to 1995 4.3L, 5.0L, or 5.7L pickup (or SUV) uses a low pressure (12 PSI) electric fuel pump located in the gas tank.
Where is the fuel pump on a GM Truck?
As you’re already aware, the throttle body fuel injection system on your 1987 to 1995 4.3L, 5.0L, or 5.7L pickup (or SUV) uses a low pressure (12 PSI) electric fuel pump located in the gas tank. And although GM did not include a Schrader valve to which you could connect a fuel pressure gauge, it can be tested with one to find out if the fuel
