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.
Idle Tracking Switch
The Idle Tracking Switch (ITS), located on the carburetor, is a mechanically operated electric switch held open by the throttle linkage when the throttle is closed. It is used on the Extended Idle Air By-Pass System.
When the ITS is opened, the EEC module is signaled to de-activate the normally closed solenoid. When this happens, vacuum is removed from the normally closed by-pass valve, and the thermactor air is released into atmosphere.
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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.