Quad will not start but turns over good.

This is a discussion on Quad will not start but turns over good. within the Engine/EFI/Drivetrain forums, part of the Can-Am DS450 Tech Discussion category; My ds 450 turns over good but will not start. Were are the fuses and what could the problem be? Thanks Braden...


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Old 02-06-2011, 10:38 PM
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Quad will not start but turns over good.

My ds 450 turns over good but will not start. Were are the fuses and what could the problem be?
Thanks
Braden
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Old 02-06-2011, 10:46 PM
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And the the fuel pump is working I can hear the little sound when I turn the key.
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Old 02-07-2011, 10:37 PM
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I have probably helped at least a dozen ppl in the past month or two get thier quad started and locate fuses so I know the info is available on this site by search. Do that and read your owners manual. Afterwards you got any questions feel free to ask.
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Old 02-10-2011, 08:01 PM
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the fuses are good
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Old 02-10-2011, 08:30 PM
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1. Are you trying to start in nuetral? I'm wondering if your switch is bad, pull the clutch and try to start see if it starts if we go the clutch switch route.

2. Are your lights working?

3. Have you load tested your battery?

4. Have you checked all your connections, put dielectric grease on them except the ECM?

5. Pull a plug see if it's black(fouled) put against the case turn it over and see if you are getting spark, or use a spark tester. If not locate the main center relay under the hood and swap with the fan(front the front looking to rear on right) or just try swapping. You should hear or feel fuel from the injector out the plug hole.

6. Are you using a fuel controller?

7. Take note of a ticking sound on the exhaust stroke if the motor is getting caught up every revolution from a bad decompressor on the exhaust cam.

Last edited by TNT; 02-10-2011 at 08:46 PM.
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Old 02-10-2011, 09:04 PM
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lights works. doesnt start with the clutch pulled.

Where are the relays?
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Old 02-10-2011, 09:08 PM
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Look in front of handlebars. There is a slot you can see through, there will be four relays in a row there. Black or grey rectangle boxes. You can pull one at a time out with a pair of needle nose pliers or remove front plastics.
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Old 02-10-2011, 09:34 PM
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There are only 3 relays under the hood in front like I said take the middle out swap it with the fan when the key is off!! You should bypass the run/stop switch or tether if you have one installed, solenoid, battery, and by trying to jump the starter too. That will help us isolate the problem.

Last edited by TNT; 02-10-2011 at 09:37 PM.
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Old 02-10-2011, 10:42 PM
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sounds dumb,but check your sparkplugs,mine fouled.
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Old 02-10-2011, 10:42 PM
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what does swap it with the fan mean? sorry im used to sleds not quads
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