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Home >> Ford >> 1991 >> Probe LX, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 3.0L >> Fuel Control System Testing >> Injector Circuit
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Injector Circuit

  1. Disconnect all injector harness connectors. Using digital ohmmeter, check resistance across terminals of each injector. See appropriate injector resistance table.
  2. On models without Sequential Electronic Fuel Injection (SEFI), disconnect injector bank harness connector, check resistance of injector bank. See INJECTOR BANK RESISTANCE table. Injectors on SEFI models have each individual injector wired to the ECA. Repair wiring or replace any injector circuit not within specification.
INDIVIDUAL INJECTOR RESISTANCE (1)

Engine Ohms
All Models 13.0-16.0
(1) Resistance values are for a single injector.
INJECTOR BANK RESISTANCE

Engine Ohms
2.3L HSC 6.0-8.0
2.3L OHC 7.0-9.5
3.0L 5.0-6.5
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