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.
1983 Chrysler ImperialFACTORY OEM SERVICE PROCEDURE
Throttle Position Potentiometer (TPP)
NOTE:
Throttle position potentiometer is mounted with break-off screws. Screws must be drilled and removed, then replaced before adjustment is possible.
- Connect EFI tester to vehicle. Place toggle switch to EFI position and rotary switch to throttle position, then turn ignition on. Move diagnostic aid switch to manual position, then move AIS control switch down and hold until AIS motor stops.
- Depress AIS by-pass button and read TPP voltage. Adjust switch position to obtain 4.0-5.0 volts. Tighten break-off screws until heads snap off.
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.