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.
ATC Tester J-23678: Notes
This tester is a new unit designed for use on the new 1971 systems. It can be used to check the operation of the system on the car and will isolate the malfunction in one of the system components as follows: Control Panel, Sensor String, Vacuum System, or Programmer. After this preliminary test, the actual malfunction can be determined quickly. The tester can also be used to test the Programmer on the bench before replacing the programmer components.
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.