Maserati Manual MK1
Lucas World Service News WSN604 Export
Mistral + 3500 GT Owner's Manual

TEST
A.8. Voltage at motor

METHOD
connect a 0 - 20v,  D.C. voltmeter between the feed snap connectors to the motor. Switch ON the ignition.

ACTION
a) If voltage is present (the pump still not operating), the motor will be open circuit. A replacement is necessary.

b) If NO voltage is present a wiring check should be made.

TEST
A.9. Pressure and Current

RECHECK there is sufficient fuel in the tank.

ACTION
1. Refill as necessary.
N.B. when starting the engine after refilling an empty tank, the system will need time in which to prime itself before a successful start
is ensured (30 - 40 seconds).

METHOD
2. DISCONNECT the fuel inlet pipe from the filter at the Metering Distributor, taking care to fit a blank on the filter union, and connect the pipe to any reliable pressure gauge of minimum reading 150 p.s.i. CONNECT a 0 - 30 ampere D.C. ammeter: in series with the motor.

CAUTION: NO SPARKS SHOULD OCCUR NEAR PETROL ENCLOSURES.

Switch on the ignition. CHECK. gauge reading is correct at 100 p.s.i.

CHECK ammeter reading is approximately 5 amperes.

ACTION
2a) Gauge and ammeter give correct readings, proceed to A.10.

b) Gauge reading LOW (around 80 p.s.i.) and ammeter reading HIGH (10 amperes). This indicates a tight pump. A replacement pump should be fitted.

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