Full Load Enrichment
- Connect adapter cable between differential pressure regulator and multimeter. Start engine and bring it to operating temperature. Confirm that lambda control is working. Unplug connector from throttle valve switch. Bridge 2 leads on wiring to ECU.
- Current reading should be constant at 7-9 mA. Lower chamber pressure should be about 5.8 psi (.4 kg/cm2 ) less than measured system pressure. If pressure reading is not correct, test control current to differential pressure regulator and test TD ignition signal.