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Home >> Mercury >> 1994 >> Sable V6-182 3.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> H - Fuel Control >> H4 - Fuel Delivery Test
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H4 - Fuel Delivery Test




- Key "OFF".

- Fuel pressure gauge installed.

- Pressurize fuel system per step H2.

- Locate and disconnect the Inertia Fuel Shutoff (IFS) switch.

- Crank engine for five seconds.

- Does pressure drop more than 5 psi (34 kPa) by the end of the five second crank cycle?

Yes -- The EEC system is not the cause of the no start. Remove the fuel pressure gauge. Reconnect the IFS switch. Refer to Diagnostic Routines for further diagnosis.

No -- Remove fuel pressure gauge. Reconnect IFS switch. Go to H8. H8 - Check Resistance of Injector(s) and Harness SFI Engines