2004 Poalaris MSX110, MSX150 PWC Original Service Manual, Page 165Get this manual
FUEL INJECTIONIGNITIONEXHAUST SYSTEMS TroubleshootingEngine Lacks Performance, RPM Limits Indicated Problem
Engine RPM will not rise with throttle flipper movement
Suspected Problem
No reaction to throttle inputPPU not working or connectedETB not learned
Solution
Check ETB and PPU wiring harness connectionsPerform ECU reset procedure by inserting lanyard, then disconnecting main relayReconnect main relay and wait at least one minuteECU will re-learn ETBUse diagnostic software to inspect throttle position function and accuracyReplace PPU or ETB
Engine idle RPM above 1600 RPM
Air leak at manifold or after ETB assembly
Verify all hose connections at throttle body and air intake manifoldVerify ETB is mounted securely to manifoldVerify drain plug, sensors, and banjo fittings are installed securely on intake manifold
Engine RPM limited to 1800 50 AND CHECK ENGINE MIL light is ON