Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1985 American Motors Encore BaseFACTORY OEM SERVICE PROCEDURE
Fuel Injection System (AMC) - TBI
- Component Testing
- Description
- Operation
- Electronic Control Unit (Ecu)
- Fuel Injector
- Fuel Pressure Regulator
- Fuel Pump
- Idle Speed Control (ISC) Motor
- Oxygen (O2) Sensor
- Manifold Air/Fuel Temperature (Mat) Sensor
- Coolant Temperature Sensor
- Manifold Absolute Pressure (Map) Sensor
- Wide Open Throttle (Wot) Switch
- Closed Throttle (Idle) Switch
- Throttle Position Sensor (TPS)
- Adjustments
- Trouble Shooting
- Preliminary Checks
- System Diagnosis
- Code 1
- Code 2
- Code 3
- Code 4
- Code 5
- Code 6
- No Test Bulb Flash
- Continuous Fuel Pump Operation
- No Fuel Pump Operation With Starter Motor Engaged
- Poor Idle When Started Cold
- Erratic Idle Speed
- Battery Loses Charge With Key Off
- Poor Idle, Oxygen Sensor Inactive
- Canister Purge Erratic
- Low Fuel Pressure
- Excessive Fuel Pressure
- Engine Will Not Start
- Engine Starts But Will Not Idle
- Poor Fuel Economy/DRIVEABILITY
- Testing
- Removal & Installation
- Specifications
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.