Fuel Pump Relay
- ECM supplies power to relay as long as ECM receives ignition reference signals or starter crank signal. To run fuel pump without starting engine, remove relay and jumper terminals No. 2 and 4. See Figure
and Figure
.
- To test relay, use jumper wires to ground terminal No. 4 of relay and apply battery voltage to terminal No. 2 of relay. Using ohmmeter, check for continuity between relay terminals No. 1 and 3. If continuity is not present, replace relay.
FUEL PUMP PERFORMANCE
| Engine |
At Idle W/O Vacuum psi (kg/cm2
) |
At Idle W/ Vacuum psi (kg/cm2
) |
| 3.2L |
41-46 (2.8-3.2) |
25-30 (1.8-2.1) |