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The Fuel Injector Module Wiring Harness, also known as the FICM harness, is responsible for delivering electrical power and signals to the fuel injector module. The fuel injector module controls the fuel injectors, which are responsible for delivering the precise amount of fuel into the engine cylinders for combustion.The wiring harness&nbsp;is a collection of wires, connectors, and terminals that form a complete electrical pathway. It ensures proper communication and power supply between the vehicle's electrical system and the fuel injector module. The FICM wiring harness is designed to withstand the operating conditions of the engine compartment, including heat, vibration, and exposure to various elements.<h2>Bad fuel injector harness symptoms</h2>A faulty or bad fuel injector harness can cause several symptoms indicating potential issues with the fuel injection system.<ul><li>Engine misfires: Rough idling, hesitation, or loss of power.</li><li>Engine performance issues: Poor acceleration, decreased fuel efficiency, or overall reduced performance.</li><li>Starting difficulties: Extended cranking times, difficulty starting, or engine stalling.</li><li>Check Engine Light (CEL) or error codes: Illumination of the CEL and specific error codes related to fuel injector circuitry or electrical connectivity.</li><li>Fuel odor or leaks: Possible fuel leaks or odor due to compromised connections or damaged wiring insulation.</li></ul><h2>Common causes of FICM wiring harness&nbsp;failure</h2>The common causes of failure in Fuel Injector Module Wiring Harnesses can include:<ul><li>Wear and Tear: Degradation over time from heat, vibration, and use.</li><li>Corrosion: Damage caused by moisture, chemicals, or environmental elements.</li><li>Physical Damage: Impact, mishandling, or friction leading to wire damage.</li><li>Faulty Connections: Loose or improperly secured connections.</li><li>Manufacturing Defects: Design, material, or assembly issues during manufacturing.</li><li>Environmental Factors: Extreme temperatures, chemicals, or moisture.</li></ul>To minimize the risk of failure, regular inspection, proper maintenance, and addressing any issues promptly are recommended. Additionally, protecting the wiring harness from harsh environmental conditions and implementing rodent deterrent measures can help prolong its lifespan.

Fuel Injector Module Wiring Harness

Air Cleaner

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Air Intake Resonator

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

Intake Manifold Repair Bracket

Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Radiator

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Radiator Control Fan Module

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Radiator Core Support Skid Bar Plate

Radiator Fan Cooling Motor

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Radiator Hose

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Engine Cooling

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

International Harvester 3900FC Fuel Injector Module Wiring Harness