Topaz L4-140 2.3L CFI (1985)
Fuel Pump Relay: Customer Interest
Engine - Hard Start/No Start
Article No. 85-9-13
HARD/NO START - 2.3L HSC CFI
FORD 1985 TEMPO
LINCOLN-MERCURY 1985 TOPAZ
Hard start or no start drive concerns may be caused by low or no fuel pressure caused by an improperly operating electric fuel pump. The fuel pump
should be checked using the following diagnostic procedure.
1.
Check fuel tank for adequate fuel supply.
2.
Check for fuel leakage at all fittings and lines.
3.
Check for electrical continuity to fuel pump:
a.
Locate inertia switch. The inertia switch is located in the luggage compartment.
b.
Remove the electrical connector from the inertia switch and connect a continuity tester to one of the leads at the wiring harness.
Figure 12 - INERTIA SWITCH
Figure 13 - FUEL PUMP, SENDER FLANGE VIEW
c.
Check for continuity between the wire and ground. If no continuity is detected, switch to the other wire and recheck for continuity. If
continuity is not present at either lead, the fuel tank must be removed from the vehicle and continuity must be checked between the
wiring harness and the switch leads. If the leads check OK, check continuity across the pump terminals (Fig. 13). If no continuity is
present across terminals, then replace the fuel pump and sender assembly. If continuity is present across pump terminals, check the
ground circuit or the connections to the pump from the body connector.
d.
Reconnect the electrical connector to the inertia switch and attach a voltmeter to the wiring harness on the pump side of the switch (the
side which showed continuity).
