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Discussion Starter · #1 ·
My 2002 1800 is only getting 30 mpg. It is running very rich on right bank of engine (plugs are black and heavily carboned). The left bank plugs show clean burn of fuel. No codes are being thrown. Anyone have an idea what is going on ?
 

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Discussion Starter · #5 ·
Fuel Milage Drop

I have used Seafoam recently with no effect. You may be right about about a senser. Most of them will throw a code. No code. It's absolutely wierd. It has a new air cleaner......Thanks!!!!
 

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Sounds like a bad oxygen sensor on the right bank.
 

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Discussion Starter · #8 ·
Fuel Milage Drop

Thanks for the responces. General maintenance items, sparkplugs, fuel filters etc. have recently been updated. My Honda Mechanic has been testing the components but has not figured it out. I don't think he has replaced the oxygen sensor as of yet. My bike has 35,000 miles at this time.
 
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