Electric

ELECTRICAL CHECK

1. Check voltage between terminal "D" (B/W wire) of fuel pump control unit, and ground, with ignition turned "ON".

^ Should be battery voltage.

If not, check wiring to fuel pump control unit.

Energizing Fuel Pump:

2. Turn ignition "OFF" and bridge terminals "B" and "D" of fuel pump control unit (B/R and B/W wires) with a jumper wire.

3. Turn ignition "ON" and listen for pump to operate.

If pump operates with jumper wire between terminals of fuel pump control unit, but does not operate when engine is running, check fuel pump control unit.

If pump does not operate, check wiring between control unit and pump. If wiring is OK, replace pump.


PRESSURE CHECK

Checking Fuel Pressure:

1. Disconnect main fuel line "A" from carburetor and connect to fuel pressure gauge, as shown in illustration.

2. Bridge terminals "B" and "D" of fuel pump control unit (B/W and B/R wires) with a jumper wire as before, and turn ignition "ON", to energize pump.

3. Note pressure on gauge.


2.8 - 3.6 psi (20 - 25 kPa)

If lower than specified, check that fuel check valve has not been removed. If check valve is OK, and fuel pressure is not within specified range, replace fuel pump.

VOLUME CHECK

Checking Fuel Pump Output Volume:

1. Disconnect main fuel line "A" from carburetor and direct end of hose into a graduated cylinder or other suitable measuring container.

2. Bridge terminals "B" and "D" of fuel pump control unit (B/W and B/R wires) as before, with a jumper wire.

3. Energize fuel pump (turn ignition "ON") for 60 seconds.

4. Note volume of fuel pumped into measuring container.

39 oz. (1,150 cc)

If volume pumped is less than specified, check in-line fuel filter and filter screen in tank. Replace as necessary. If filters are OK and volume is low, replace pump.