Service manual

G420F(FE) Service Manual 241 Chapter 7. MPI Gasoune Fuel Delivery System
Fuel Pressure Test
Release The Internal Pressure
1. Disconnect the fuel pump connector.
2. Start the engine and wait until fuel in fuel line is
exhausted.
3. After the engine stalls, turn the ignition switch to
OFF position
and diconnect the negative (-) terminal from the
battery.
NOTE: Be sure to reduce the fuel pressure before
disconnecting the fuel feed hose, otherwise fuel will
spill out.
Install The Special Service Tool (SST)
For Measuring The Fuel Pressure
1. Disconnect the fuel feed hose from the delivery
pipe.
CAUTION
Cover the hose connection with a shop towel to
prevent splashing of fuel caused by residual
pressure in the fuel line.
2. Install the Fuel Pressure Gage Adapter (09353-
38000) between the delivery pipe and the fuel
feed hose.
3. Connect the Fuel Pressure Gage Connector
(09353-24000) to the Fuel Pressure Gage
Adapter (09353-38000).
4. Connect the Fuel Pressure Gage and Hose
(09353-24100) to Fuel Pressure Gage Connector
(09353-24000).
5. Connect the fuel feed hose to the Fuel Pressure
Gage Adapter (09353-38000).