Bonneville V6-3800 3.8L Supercharged (1992)
Chart A-7, Fuel System Pressure Test (2 Of 2)
CIRCUIT DESCRIPTION:
The fuel pump will deliver fuel to the fuel rail and injectors, then to the pressure regulator, where the system pressure is controlled. Excess fuel pressure
is bypassed back to the fuel tank. When the engine is stopped, the pump can be turned "ON" by applying battery voltage to the test terminal located in
the engine compartment. Improper fuel system pressure may contribute to Codes 44 or 45, cuts out which may feel like an ignition problem, hesitation
loss of power or cause a "Cranks But Won't Run" condition.
TEST DESCRIPTION
