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2007 Honda Rancher TRX420TE ... Help Diagnose this Noise!

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  #21  
Old 01-22-2022, 07:43 AM
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Originally Posted by merryman
"it "smells" like its running rich"


It is just possible that the engine temp sender is telling lies, so the ECU thinks it needs choke all the time. Check plug colour, black and sooty and it is running rich. Regarding the running on reserve, as you know, all the fuel tap does on reserve is pick fuel up nearer the bottom of the tank. If fuel runs out of the pipe going to the filter/pump canister when the tap is ON the bike should run with it like that.
Hmm ... quite possibly. Would that be the air temp sensor in the airbox? Or the water temp sensor?

I'll check the plug condition soon ... I've been meaning too.
 
  #22  
Old 01-23-2022, 02:55 AM
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Water temp sensor on top of the head. When the engine is cold the air fuel mix in the engine needs to be richer, and it is the water temp sensor which reads how warm the engine is.
 
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