GxT Ferret 63 DIAGNOSTIC ENGINE ANALYZER - Manual (Page 29)

TESTING ENGINES THAT MAKE RADIO
INTERFERENCE NOISE:
Engines that have metallic (non-resistance) wires going to
the ignition distributor usually radiate radio interference. If
severe enough it can cause the engine analyzer opera-
tion to be disrupted. This usually causes it to return to
Setup or to display strange characters. If you have these
problems the interference will have to be reduced.
Placing resistance in the distributor to coil wire will help.
Substitute a 10K to 20K ohm length of wire, or use a
plug-in resistance adaptor while testing the engine.
Test for severe radio noise by seeing if the analyzer
works better with the spark pickup disconnected. Some-
times noise is caused by bad sparkwire insulation and
dirt which can allow sparks to track along the outside of
a wire.
REFERENCE INFORMATION
-27-
GREEN
COIL PRIMARY SPARK PICKUP
NO. 1
SPARK
PLUG