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My 2009 Yamaha VMax 2ooHP HPDI has a engine miss. On two…

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My 2009 Yamaha VMax 2ooHP...
My 2009 Yamaha VMax 2ooHP HPDI has a engine miss. On two cylinders the coils will fire for about 5 seconds an then quit firing any suggestions?
Submitted: 2 years ago.Category: Boat
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Answered in 5 minutes by:
2/2/2016
Marine Mechanic: Jason, Marine Mechanic replied 2 years ago
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 18,190
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
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Hi Roy, my name is Jason

Is this happening at idle or full throttle? Does the engine make full power? How long have you owned this engine for, and has it ever been any different in the past for you?

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Customer reply replied 2 years ago
Ive owned motor for three years replaced plugs 6months ago it started two have hard time starting and now has a miss at idle and not fev up as it should
Marine Mechanic: Jason, Marine Mechanic replied 2 years ago

Does the engine make full power under a load? What is the max rpms the engine will do with the boat in the water?

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Customer reply replied 2 years ago
No doesn't get full power max rpm 4,000
Marine Mechanic: Jason, Marine Mechanic replied 2 years ago

Okay. Step 1 is to swap the non firing coils for coils that are firing, does the problem follow the coil, or does it stay on the same cylinders? Also, which cylinder specifically are not firing?

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Customer reply replied 2 years ago
Don't know answers to your questions I will try swapping coils and go from there
Marine Mechanic: Jason, Marine Mechanic replied 2 years ago

Let me know how you make out.

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Marine Mechanic: Jason, Marine Mechanic replied 2 years ago

Hello, just checking in. Any luck?

Jason

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Customer reply replied 2 years ago
Haven't had time to do anything yet
Marine Mechanic: Jason, Marine Mechanic replied 2 years ago

Okay, let me know how you make out.

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