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.
Computerized Engine Controls: Notes
All models use either a Bosch LH-Jetronic multi-point fuel injection system with EZ116K electronic ignition system or Regina (Bendix) multi-point fuel injection system with Rex-1 electronic ignition system. Both systems have self-diagnostic capabilities.
Both systems use an Electronic Control Unit (ECU) receiving input from engine monitoring sensors. These sensors include; coolant temperature sensor, air temperature sensor (Regina), pressure sensor (Regina), oxygen sensor, knock sensor (turbo), mass airflow meter (Bosch) and throttle switch. ECU uses these input signals to control air/fuel mixture for emission control, fuel economy and good driveability. Ignition control is provided by a separate ignition ECU. Turbo models also use a turbo ECU.
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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.