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.
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HOMESERVICE MANUALSTRIUMPH1980SPITFIREREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSHEATED AIR INTAKE SYSTEM - CARBURETED MODELSTESTINGTR7
1980 Triumph Spitfire
Heated Air Intake System - CARBURETED Models: Testing: Tr7
1980 Triumph SpitfireSECTION Tr7
- Disconnect vacuum line and apply a minimum of 9 in Hg. Flap should move to fully closed (hot) position. Remove vacuum, flap should return to fully open (cold) position.
- Disconnect sensor vacuum supply line and apply a minimum of 9 in. Hg vacuum to sensor. Flap valve should move to closed position and hold until vacuum is released.
- Apply 9 in. Hg vacuum to one-way check valve. Flap valve should close and hold closed for 20 seconds after vacuum is released.
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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.