Do not force the feeler gauge into the air gap. This
should be a go-no-go tolerance.
Unless the distributor sensors depend directly on the
electronic module for operation, as they do in the American
Motors Breakerless Inductive Discharge System (BID), the
engine analyzer may be used to check the magnetic pickup
coil. To check the coil, operate the analyzer in the self-sweep
mode and disconnect the pickup from the harness.
NEVER connect the analyzer to a distributor
without first referring to the operators manual for
the correct procedure.
Connect the red and black test probes across the
pickup coil wires and crank the engine as you
observe the screen display. The screen trace should
oscillate above and below the zero line if the pickup
ELECTRONIC LEAN BURN
SYSTEM/ELECTRONIC SPARK CONTROL
Since current model engines burn a leaner fuel air
mixture within the cylinders, a special means of igniting
this mixture is required; for example, the electronic lean
burn system (fig. 4-34). It consists of a solid-state spark
control computer, various engine sensors, and a
specially calibrated carburetor. Also, the distributor
provides centrifugal spark advance only (no vacuum
Figure 4-34.-Lean burn ignition system.