High Speed Miss - Marine Power 5.3 GEN V DI Owner's Manual

12.
Trouble Shooting
Engine Runs Poorly at High RPM
Possible Cause
Low Grade or Old Fuel
Ignition Timing
Active Trouble Code
Engine Overheating
Restricted Exhaust
Overfilled Crankcase
Plugged Fuel Tank Vent
Insufficient Fuel Supply
Restricted Anti-Siphon Valve
Low Compression
Engine performance can be greatly affected by boat hull and prop condition.

High Speed Miss

Possible Cause
Water in Fuel
Clogged Fuel Filter
Insufficient Fuel Supply
Spark Plug or Wires
Loose Ignition Connection
Detonation
NOTE: A Misfire will Cause a Trouble Code and RPM Reduction.
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Remedy
Check/Clean/Replace
Only Pertains to HVS (Distributor) on 5.7L. See Dealer
See Dealer
See Engine Overheating on Page 45
Check Exhaust System
Check Oil Level
Check Vent Line for Blockage
Approximately 60 PSI. Fuel Pressure Must Be Adequate at Wide Open Throttle at Full Load
Remove From Fuel Tank and Verify Spring Pressure
See Dealer
Remedy
Inspect/Clean/Replace
Change Fuel Filter
Approximately 60 PSI. Fuel Pressure Must Be Adequate at Wide Open Throttle at Full Load
Verify That All Plug Wires Are Attached
Check That All Connectors Are Attached
Verify Fuel Pressure and Fuel Quality
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