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
Preliminary Check
- Connect tachometer and adjustable timing light to engine. Start engine and allow to idle. Idle speed should be between 530-630 RPM. If not, adjust idle speed using EFI tester.
- Ground closed throttle switch using jumper wire. Timing light should indicate 12° BTDC. If not, adjust basic timing. Raise engine RPM to 1500 RPM with switch still grounded. If timing changes, CCC must be replaced. If timing does not change, go to next step.
- Remove jumper wire from closed throttle switch and decrease engine speed to 1000 RPM. Timing should be 27-35°. If not, replace CCC. If so, go to next step.
- Increase engine speed to 2000 RPM. Timing should be 47-55°. If not, replace CCC. If so, engine has passed preliminary test. Other testing must be done with EFI tester.
Factory Service Tools
Use the Manual With the Right Hardware
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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.