2003 Ski-Doo ZX Series Factory Shop Manual, Page 95Get this manual
Section 03 TROUBLESHOOTING Subsection 05 (ELECTRICAL SYSTEM)
SYMPTOM CONDITION TESTINSPECTION
THE MPEM DOES NOT WORKNORMAL USE1Check that high tension coil wires do not touch any metal partsaShort circuitIsolate and reroute wires
SYMPTOM CONDITION TESTINSPECTION SYMPTOM CONDITION TESTINSPECTION
ENGINE STALLSNORMAL USE1Refer to IGNITION SYSTEM DIAGNOSTIC FLOW CHARTENGINE IS MISFIRING ERRATIC SPARK AT SPARK PLUGRIDING ON WET SNOW1Check if spark plug wires andor spark plug cap seals are sealing out moistureaDefective wires andor sealsReplace defective part2Check if ignition system wiring harness connectors are in good condition andor are sealing out moistureaLoose connectors, corroded terminals or defective partsClean terminals and apply silicone dielectric greaseReplace defective parts
CONDITION TESTINSPECTION