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If there were any such intermittent problems, the Testing Individual EFI Components NOTE: For all of the following tests using the EFI Analyzer, the analyzer power light must be ENGINE RPM FUNCTION This test can be used to verify the snowmobile 1. Place the rear of the snowmobile on a safety stand. 2. Start the engine. 3. Connect the analyzer harness (analyzer OFF) to the diagnosis test plug. Connect the external leads of 4. Switch the analyzer ON. 5. With the analyzer power light illuminated and using an analyzer with the new updated EPROM chip, Engine RPM 6. Press the TEST button. Actual engine RPM should now be indicated. Slowly compress the throttle NOTE: The test harness must be connected to the ECU after the engine has been started. If connected NOTE: If proceeding to another test, first press the TEST button once again to cancel the present IGNITION TIMING TEST FUNCTION NOTE: When using an analyzer which has been updated with the new EPROM chip, first select 1. Place the rear of the snowmobile on a safety stand. 2. Start the engine. 3. Connect the analyzer harness (analyzer OFF) to the diagnosis test plug. Connect the external leads of 4. Switch the analyzer ON. 5. With the analyzer power light illuminated, press the MENU SELECT buttons repeatedly until the words Ignition Timing 6. Press the TEST button; then increase the engine RPM to the specification given. Actual engine timing Timing Specifications Model Degrees @ RPM 500 EFI 24 + 2 3500 580 EFI 30 + 2 4000 600 EFI 20 + 2 5000 NOTE: The test harness must be connected to the ECU after the engine has been started. If connected NOTE: Ignition timing remains the same on either a hot or cold EFI engine. Always verify timing at NOTE: If proceeding to another test, first press the TEST button once again to cancel the present EXISTING PROBLEM DIAGNOSIS NOTE: When using an analyzer which has been updated with the new EPROM chip, first select 4 4-51 |