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.
Testing & Diagnosis: Notes
- TESTING OF FORD MOTOR CO. FEEDBACK CARBURETOR CONTROL ELECTRONIC CONTROL SYSTEM - Due to the complexity of the Feedback Carburetor Control system, a special diagnostic tester is required. This tester consists of a control module tester (test selection box) and a digital volt/ohm meter (DVOM). The DVOM plugs into the computer tester with a special 12 pin plug. The DVOM contains two additional test leads, independent of the special 12 pin plug, for performing volt/ohm readings. The feedback carburetor tester performs 13 different tests. These tests check functions and specifications of the feedback carburetor control module, vacuum regulator and switches, exhaust gas oxygen sensor, and exhaust gas recirculation valve. Other items needed to perform tests are; an accurate tachometer, an accurate vacuum gauge, a hand vacuum pump/tester, and an engine speed control tool.
Without the special test equipment, the Feedback Carburetor Control Electronic Control system cannot be fully tested, but, a number of preliminary checks can be made to help eliminate some problem areas.
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.
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