Wont run for more then 10 sec

'03 400 backfiring/bogging under throttle - ArcticChat.com ...

www.arcticchat.com > ... > ATV's > General ATV Discussion
Apr 3, 2007 - 7 posts - ‎7 authors The engine would only sputter and bog down, kinda like the choke was hung. ... I didn't remember the fan running, so I checked the fan fuse, but it was ... of the windings and cause a misfire, so bad that it would kill the bike. '07 F8 intermittent start and bog issue - ArcticChat.com
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Has anyone checked base fuel pressure with a gauge ?

did you give it a tune up change plugs fuel filter

Could be your throttle position sensor,here's how to check.Here's the part.

Check your Sparkplug Wires Make Sure There on the Right Ones...OK..

air adjustment

It's the automatic choke!

The choke is "closed" or barely open... When cold, the engine needs a RICH mixture (more gasoline, less air). When the engine warms up, it requires a LEAN mixture (less gas, more air).

It is probably creating BLACK tailpipe smoke ... that means unburnt gasoline. (Blue smoke is OIL, white smoke is WATER).

Put the parking / emergency brake ON.
1. Remove air cleaner assembly from intake, use a carb cleaner spray or throttle body spray cleaner and spray just a little. (AutoZone $5)
2. Find the accelerator arm under the hood.
3. start car, rev the engine to make sure how to operate the accelerator from under the hood.
4. Carefully spray into carb / throttle body and work the accelerator ... don't let the engine die...
5. Watch out for "backfire"... it may create a small flame out of the carb. It will extinguish itself in one second.

6. You may need to do this two, three times.
7. Add a "complete fuel system cleaner" to your next tank of gas ($8).

That's it! ... pretty cheap, too.

Hope this helps!

Disconnected what line?

it could be a simple fule filter!

If you can do your own work, try some things if its dies you ether loseing fuel pres, injector control, or spark........ the fuel pres is easyest to ck, just stick a gauge between the pump and the rail, should be 42-43lbs, on the spark pull a coil stick and put an extra plug in it and fire up the bike be careful doing this is case of fuel leaks under tank, if the bike quits and you try to start it and you still got spark this may be ok, this is a bit more difficult, you have to ck the plug connections at the coil sticks, if you ck in a service manual each coil has two wires going to it one is going to be powered all the time, the other one is grounded by the ECM when the injector is supposed to fire, a node light will help in checking this, OR you can do what most of us do, take the bike to a good suz guy that knows what he's doing