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.