2011 king quad 400asi ISSUE

[schreck562]

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 April 14, 2014 by schreck562

[Tim-ANC]

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

[schreck562]

Thanks i will def try that when i get home from work, im definately comfortable doin this as ive done it on my car, thanks do much for the info as im frustrated as all hell with way its running on the low end, ill post what i find out

[Tim-ANC]

Do you have a manual for it? I did not see one available on the forum sticky.

MYGREENMANUALS - REPAIR MANUAL DOWNLOADS might have.

[schreck562]

Repair manual, no, just havent got around to getn one, just got quad end of feb, just have owners manual, ill check that site out thanks

[schreck562]

Tried the diagnostic jumper and it does nothing on my quad, nothing shows up like is posted on thread u led me too

[Tim-ANC]

That link was for an older model and might be configured different. Get a manual to be sure you are on the right pins and have the correct procedure.

[schreck562]

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

[Tim-ANC]

I should have asked earlier, is it still on warranty?

[schreck562]

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?

[Tim-ANC]

No idea what Suzuki`s warranty is. Give the dealer the vin number. They should be able to find out. Worth asking the question regardless.

[schreck562]

I agree thank u