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.
1981 Triumph TR8 Automatic TransFACTORY OEM SERVICE PROCEDURE
Feedback Monitoring System (Triumph Models Only)
- Start and run engine until normal operating temperature is obtained. If engine is already hot, run engine for 2 minutes before testing. Connect feedback monitor (60973066) to diagnostic connector in harness near ECU. Place feedback monitor switch in "LOW" position. See Fig 1.
- Mixture is correct when either No. 2 or No. 3 lights in either row glows. Any other light combination, except No. 1 or No. 4 lights in either row, is acceptable.
- If both No. 3 lights glow, remove mixture screw plug and adjust mixture until No. 2 and No. 3 lights in either row glow. Turning mixture screw clockwise richens mixture, counterclockwise leans mixture.
- After setting mixture, remove vacuum pipe from fuel pressure regulator with feedback monitor still connected. Lights should move to left, indicating richer mixture (for example, from No. 2 to No. 1). If lights do not shift, check wiring circuit and/or replace oxygen sensor.
Factory Service Tools
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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.