300TE (124.090) L6-3.0L (103.983) (1989)
Air/Fuel Mixture: Adjustments
Checking the Air/Fuel Mixture Adjustment
California Models
NOTE:
a. Checking the idle air/fuel mixture adjustment will require the use of the on/off ratio tester (Bosch KDJE-P 600) or equivalent.
b. All tests are to be performed after engine has reached normal operating temperature.
c. All accessories must be switched off.
d. The engine must be in good mechanical working order and free from electrical misfires.
Fig. 72 Bosch On/Off Ratio Tester
Diagnostic Socket Location
1.
Connect the on/off ratio tester to the diagnostic socket.
2.
Disconnect the purge line to the throttle valve assembly at the purge valve and plug it.