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Home >> Ford >> 1991 >> Cutaway 7.3 M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Injectors >> Fuel Injector Circuit
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Fuel Injector Circuit

Disconnect all injector harness connectors. Using digital ohmmeter, check resistance across terminals of each injector. See INDIVIDUAL INJECTOR RESISTANCE . Disconnect injector bank harness connector, and check resistance of injector bank. See INJECTOR BANK RESISTANCE . Repair injector bank or any injector not within specifications.

INDIVIDUAL INJECTOR RESISTANCE (1)

Engine Ohms
2.3L & 3.0L 15-18
All Others 13-16
(1) Resistance values are for a single injector.
INJECTOR BANK RESISTANCE

Engine Ohms
2.3L 7.0-9.5
2.9L, 3.0L & 4.9L 5.0-6.5
5.0L, 5.8L & 7.5L 3.0-4.0
NOTE: For further component testing and information, see appropriate TESTS W/CODES article in the ENGINE PERFORMANCE Section.
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