LUCAS INJECTION

Lucas MK1 and MK2 fuel / petrol injection

 

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


 

FAULT A:       ENGINE WILL NOT START

Assuming that there is sufficient fuel in the tank, that the ignition system is in order, and that the starter will crank the engine, the following
diagnosis is recommended:-

N.B. If the fault is found to exist in any category after' A.5, then after rectifying and ensuring the engine functions correctly, Reconnect
the lead from the thermal switch to the oil pressure switch.


TEST
A.1. Pulsations at Metering Distributor

METHOD
Switch ON the Ignition, RESET manual button, as necessary, and maintain in this position. CRANK the engine, and progressively press
firmly with finger on the non-return valves in the outlet ports on the Metering Distributor. A distinct pulsation should. be felt as injection takes
place. Alternatively, the injection pipe unions at these ports may be slackened, and a flow of fuel should occur from each union in turn as the
engine is rotated.

ACTION
a) If pulsations are felt, proceed to A.12 via A.5
b) If NO pulsations are felt, proceed to A.2A


TEST
A.2 Fuel Pump

METHOD
Locate the pump at the rear of the car and on eliminating extraneous noises, the pump should  be heard running.

ACTION
a) If the pump is heard to be running proceed to A.9 via. A.5.
b) If the pump is NOT running proceed to A.3


TEST
A.3 Operation of Safety Switching Circuit

METHOD
RELEASE the manual reset button, and the warning light should be illuminated.

ACTION
a) If the warning light illuminates proceed to A.4.
b) If the warning light does NOT illuminate check the wiring, especially the supply from the ignition switch to terminal 8 on the thermal switch.

 

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