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Colerollscoal

2003 arcticcat 400 4x4 fis no fire

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I could use some help one day my atv was running it idled for about 5 mins and i cut it off to check the oil then it wouldent start back turns out its not gettin fire i have check the cdi the coil and  all the fuses am i missing anything? Any help would be appreciated

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Is it getting spark? sometimes the plug will go bad and have spark outside the engine, but won't fire under pressure.

 

Mike

 

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I put 

3 hours ago, Zaro77 said:

How did you check the CDI? Mike is right, try with new plug first.

Zaro

I replaced the plug and still no fire and i tested the cdi on an identical arcticcat my buddy has 

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Next step would be the coil. I attached the diagram, it is #10

I would also check #16, if you look at the diagram there is a sensor that sends a signal to the CDI to tell it to fire the spark plug.

Pull the connectors apart, check for corrosion. Clean with electric clean and grease with diaelectric grease before plugging back in.

Mike

 

2003 400 FIS.jpg

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It is possible the spark plug cap to be faulty. I would perform spark check without spark plug cap - directly from the HV wire.

Whish you success.

Zaro

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OK. So, as Mike suggested, you must check the magneto. But you will need a multimeter. Here, in the attached file you will find the specs for the measurements.

ATV Section 5.pdf

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And something else, check the 12 V power supply to the CDI. As you see in the wiring diagram, the orange/white wire going to the CDI should have +12V with the ignition ON.

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Have you ever replaced the flywheel? If not your magnets may have let loose.. I have save machjne and just had same symptoms and 2 magnets came loose..pm me for cheap parts list if needed.


Sent from my iPhone using Tapatalk

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Good point, I forgot some year machines had issues with the magnets coming loose.

That would cause it not to send a signal to fire the plug.

 

Mike

 

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If your magnets come loose, but do not break up or otherwise destroy anything, go to your local hardware and buy some Gorilla Glue brand epoxy. and glue them back in. They must be spaced properly same distance between all the way around. When you pull the cover off and get a look at them the polarity alignment is correct. Mark the outside edge of all of them with a paint marker or magic marker. Pull the magnets out and use a wire brush wheel to clean off the old glue. Clean rotor body and scuff up with emery cloth. Make sure that all is clean and free of dirt and oil. Make yourself a spacer stick to get the magnets spaced right. Have enough of those little spring loaded clamps to clamp each magnet in place. Wait overnight, remove clamps and install. Actually the gorilla epoxy sets up within an hour or two and it takes a little propane or map gas torch to get it to let go if you make a mistake. Or you can buy an updated flywheel on fleabay for about $200.

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Magnets at flywheel mine just went this fall, should have been a recall but it happens 10 orso years later, thats my two cents. Yooper

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11 hours ago, Fred Saari said:

Magnets at flywheel mine just went this fall, should have been a recall but it happens 10 orso years later, thats my two cents. Yooper

If there was a recall for your machine, it does not matter how many years have passed. Call a dealer and give them your VIN number, they can check it for you.

 

Mike

 

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