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2011 king quad 400asi ISSUE


schreck562
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I got a 2011 king quad 400 asi thats fuel injected (throttle body) when machine is cold it runs great, after riding it for a while it gets extremely sluggish when ur just kinda cruising with a little bit of throttle applied, goin about 8-10mph with just a little bit of throttle it feels and sounds like the engine is struggling or under an extreme load, if u give it more throttle it will pick up and take off and run great, it seams to me i got fuel/air problem but know nothing of how to work on fi atv, i changed and used all grades of gas, changed plugs ( which r black as coal) , if u take aircleaner out it will run better for a little bit then it seems to get worse, it will also backfire when freewheeling or coasting down a hill whether its 1mph or 10mph short of taking it to the garage and raping my wallet i dont know where to go or what i can do do solve the issue if anything, i dont wanna have to spend $300 on a fuel programmer for a machine that should run fine without one, oh forgot to mention the kg is completely stock and only has 660 miles and 140 hrs, can anyone help???

Edited by schreck562
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Dream Car Giveaway

You need to get a read on your ECM first. Call auto or ATV part stores and ask if they have the ability to read. It requires a "dealer tool" which plugs into the ECM connector. You can jumper it but I wouldn`t advise this unless you are an experienced mechanic. I did a quick search to buy one but haven`t seen anything. Here is a basic description of the process.

Getting trouble codes from your ECU on king

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I called dealer and they said with that model it has to b taken to dealer and hooked up to computer to read the codes and reset them, my machine is running rich especially at low rpm so was hoping there was a code, but dealer told me being its a throttle body there still may b air/fuel adjustment screw on outside of the tb, ilk check that out later i quess

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I doubt it, its a 2011 with 600 miles, im second owner, i got it with 480 miles but of coarse i dont know how long of a warrenty suzuki gives and the guy i bought it from said nothing about it, honestly i never thought to ask, i suppose i could call the dealer from which it was bought, what it the typical warrenty?

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