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What does a fuel regulator do for 1999 Chevy Suburban?

In a 1999 Chevy Suburban, the fuel pressure regulator's job is to maintain a consistent fuel pressure within the fuel rail, regardless of engine speed or demand. This ensures the injectors receive the correct amount of fuel for optimal combustion. It does this by:

* Regulating fuel pressure: It reduces the higher pressure from the fuel pump to a specific, lower pressure needed by the fuel injectors. This pressure is usually around 40-60 PSI (pounds per square inch) for that model year, but consult your vehicle's service manual for the precise specification.

* Returning excess fuel: Any fuel not used by the injectors is returned to the fuel tank through a return line. The regulator controls this return flow, managing the pressure within the system.

If the fuel pressure regulator fails, it can lead to several problems: poor fuel economy, rough idling, hesitation during acceleration, engine stalling, and even a complete engine failure.

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