Where is the idle regulator located on a TBI 220?

The pressure regulator on a TBI 220 unit is serviced as a part of the meter cover and should not be disassembled. All engine idle speeds are controlled by the ECM through the idle air control (IAC) valve mounted on the throttle body.

How does the pressure regulator in the TBI work?

A pressure regulator in the TBI keeps fuel available to the injectors at a constant pressure between 62 and 90 kpa. (9 to 13psi.) Fuel in excess of injector needs is returned to the fuel tank by a separate line.

Where is the fuel pump located in a TBI?

The ECM controls the injectors that are located in the fuel meter body assembly of the TBI. The injectors deliver the fuel in one of several modes. In order to properly control the fuel supply, the fuel pump is operated by the ECM through the fuel pump relay and oil pressure switch.

What kind of fuel pump does a TBI 454 have?

Stock TBI 454 makes 230hp and 380tq so stock fuel pump is maxed out right off and a typical 454 will run better with a fuel pump upgrade even with stock chip. GAS MILEAGE. Always a big complaint with 454 TBI trucks. 90 and older is particularly bad and that is largely due to NO OVERDRIVE.

Is there a problem with my 454 engine?

I have asked a number of people and have been told that it is a motor home issue caused by the dog house engine cover and that the 454 was redesigned around that time to increase engine heat to increase millage. My question remains, is it just my 454 or have other people had the same problem?

The pressure regulator on a TBI 220 unit is serviced as a part of the meter cover and should not be disassembled. All engine idle speeds are controlled by the ECM through the idle air control (IAC) valve mounted on the throttle body.

A pressure regulator in the TBI keeps fuel available to the injectors at a constant pressure between 62 and 90 kpa. (9 to 13psi.) Fuel in excess of injector needs is returned to the fuel tank by a separate line.