Turns over, wont start

This is a discussion on Turns over, wont start within the Engine/EFI/Drivetrain forums, part of the KFX450 Performance category; Aight i have an 08 kfx 450 that has me completely stumped right now. It turns over fine, am getting fuel all the way to ...


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Old 08-29-2010, 02:57 PM
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Turns over, wont start

Aight i have an 08 kfx 450 that has me completely stumped right now. It turns over fine, am getting fuel all the way to the spark plug but am getting no spark. Its not throwing any lights and from what i have read if it was the rollover sensor the FI light would be flashing and fuel would be shut off as well. I have also Checked the TPS plug and adjusted the Idle Knop, battery is fully charged and the Spark plug is only a couple months old and not in bad shape. Checked the fuse on the starter relay terminal as well And i know Im at least getting power to it because its clicking. Only thing i can possibly think of is the starter. (in case im calling it wrong the part the spark plug wire plugs into) Is this a possible cause or is there something i am missing? thanks for any help yall can give me
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Old 08-29-2010, 04:05 PM
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have u tried to bump start it? if u can bump start it? have u checked the gap o nthe plug? tried a new plug?
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Old 08-29-2010, 04:10 PM
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ya tried bump start in 1st and 2nd gear being towed, this thing is just dead
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Old 08-29-2010, 04:27 PM
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check throttle cable. if the throttle is cracked open a little it will not start. just a long shot.
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Old 08-29-2010, 04:32 PM
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Squalling tires...

Hold it... you say you have no spark?

The coil is on the frame there on the right side.
Take the tank off... and take the wire totally off.
Turn it over and see if you see spark jump from the end of the coil to the frame.

If not, check the wire connections on the back between it and the radiator.
If that is not it, perform the coil testing instructions per the service manual.

If you do have spark at the coil, buy a new wire or yank yours apart, trim a little and put it back together.
My plug wire has been F'd up a couple of times... loosing connection inside where the wire goes in the ends.
If you yank it apart you'll see why... it's a pretty dang primitive deal.
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Old 08-29-2010, 09:26 PM
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thanks for the input everyone, bad connection on the relay terminal turn out to be the problem (went and bought voltimeter and started testing things lol) so hellz ya to labor day weekend. And honestly i learned alot during this process
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Old 08-29-2010, 11:09 PM
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Yep... can't own a KFX and not buy and learn to use a multimeter...

Not unless you're made of money or have someone who will do it for you....
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'08 KX Cams
Custom Intake
Jardine RT99 Exhaust
Moose Racing Handguards
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ProArmor PowerGRIP System
ProArmor full skid protection
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Walsh lower stem bearing
Derisi Racing Suspension
CCP Steering Stabilizer
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