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.
1988 Ford Festiva L PlusFACTORY OEM SERVICE PROCEDURE
EFC System
- Description
- Operation
- Air Bleed Control Valve (ABCV)
- Barometric Pressure (BP) Switch
- Coolant Temperature Sensor
- Coolant Temperature Switch
- EGR Valve Position Sensor
- Electrical Switch Inputs
- Exhaust Gas Oxygen (Ego) Sensor
- A/C Clutch Switch
- Gear Position Switches
- Idle Switch
- Manifold Absolute Pressure
- Vacuum Switch
- Engine Speed Signal
- Idle-Up Solenoids
- Fuel Shutoff Solenoid Valve
- Testing
- Self-Diagnostic System Check
- Malfunction Indicator Light (Mil)
- ECA 2 - Code 01 (Ignition Pulse)
- ECA 4 - Code 09 (Coolant Temperature Sensor)
- ECA 8 - Code 13 (Map Sensor)
- ECA 14 - Code 15 (Ego Sensor)
- ECA 19 - Code 16 (EGR Valve Position Sensor)
- ECA 23 - Code 17 (Feedback System)
- ECA 28 - Codes 18, 19, 20 & 21 (Air Bleed Control Valve)
- ECA 31 - Code 22 (Fuel Shutoff Solenoid)
- ECA 35 - Codes 28 & 29 (EGR Solenoid Valve)
- ECA 39 - Code 31 (Air Control Valve)
- ECA 43 - Codes 34 & 35 (Idle-Up System)
- ECA 47 - Code 38 (EFE Heater Relay)
- ECA 51 - Code 70 (Vacuum Switch)
- ECA 55 - No Code (Keep Alive Power)
- ECA 57 - No Code (Key On Power)
- ECA 59 - No Code (Ground)
- ECA 61 - No Code (Idle Switch)
- ECA 64 - No Code (4TH Gear Switch)
- ECA 67 - No Code (Clutch & Neutral Switches)
- ECA 70 - No Code (Coolant Temperature Switch)
- ECA 73 - No Code (Barometric Pressure Switch)
- ECA 76 - No Code (Electrical Switch Inputs)
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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.