isuzu Workshop Repair Guides

Isuzu Workshop Service and Repair Manuals

Fuel Pump Relay > < Pressure, Vacuum and Temperature Specifications|Page 3225
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22. a. Command the fuel pump "ON" with the Scan Tool.

b. Using suitable pliers which will not damage the fuel hose, gradually apply pressure with the pliers to pinch the flexible fuel return hose closed.
c. Does the fuel pressure indicated by the fuel pressure gauge rise above the first specified value?

[VALUES] 376 kPa (55 psi).

[YES]

Go to Step 11.

[NO]

Go to Step 7.

CAUTION:  Do not let the fuel pressure exceed second specified value.

[VALUES] 414 kPa (60 psi).

23. a. Command the fuel pump "ON" with the Scan Tool.

b. Remove the fuel filler cap and listen for the sound of the fuel pump running.
c. Turn the pump off.
d. Was the fuel pump running?

[YES]

Go to Step 7.

[NO]

Go to Fuel System Electrical Test. 

Fuel Pump Relay > < Pressure, Vacuum and Temperature Specifications|Page 3225