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UTV's Off Road ( RZR, YXZ, Mini Buggy, Carts,etc.) => UTV Controls and Electrical => Topic started by: Lance-W on August 22, 2009, 02:50:42 PM

Title: Hayabusa - Won't start ?
Post by: Lance-W on August 22, 2009, 02:50:42 PM: OK, We've got it all wired.

It has the resistor in the kick stand circuit.
It's still running the factory tip over sensor.
I have no intake air sensor.....
It cranks but there's no spark.
When you turn the key to "on" it sends a tiny little spike (~2volts) of electricity to the fuel pump but no constant current. The fuel pump runs if you hot wire it.

Anybody have any ideas?

It's a first gen Busa. 2005
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 22, 2009, 03:36:57 PM: Fuel pump circuit is working. Just the computer is not turning it on.
The injectors seem to be not firing. When I "vent" the fuel line it has pressure which leads me to believe the injectors aren't firing and relieving the pressure.
The coil packs have power.

Also I used basically used the entire wiring harness up to and including the ignition switch. What are the MUST HAVES for the computer to want to run?
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 06:27:08 PM: Still need help. Still doesn't run.
Title: Re: Hayabusa - Won't start ?
Post by: Jet on August 23, 2009, 08:39:03 PM: No resistor in the side stand switch? isn't it just bridged?
Pull the TOP apart and tap it up so it doesn't ever create an issue.
It must have the ignition barrel, are you running that?
If not, you need to install a resistor inline somewhere, Search for it, there's heaps of into floating around.
Cheers
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 08:54:36 PM: Quote from: Jet on August 23, 2009, 08:39:03 PM
No resistor in the side stand switch? isn't it just bridged?
Pull the TOP apart and tap it up so it doesn't ever create an issue.
It must have the ignition barrel, are you running that?
If not, you need to install a resistor inline somewhere, Search for it, there's heaps of into floating around.
Cheers

TOP?

Ignition barrel? You mean the factory ignition switch? Yes it has that.

Side stand - yes I just bypassed the resisitor I put in it. So basically it's connected/bridged hard.
Title: Re: Hayabusa - Won't start ?
Post by: fabr on August 23, 2009, 09:07:47 PM: Where to start ? i just read this. Gotta hit the sack soon but is the tip over switch upright? Either remove it and put a resistor in it's place or open it and silicone the ring in it in the center of it's travel. There are 2 plugs in the wiring harness that are alike. Right now I don't remember what they are but you may have them reversed also. Easy to get them wrong.I think they are the water temp and IAP? Maybe,maybe not. ??? Several other things but check those first.
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 09:58:35 PM: Quote from: Masterfabr on August 23, 2009, 09:07:47 PM
There are 2 plugs in the wiring harness that are alike. Right now I don't remember what they are but you may have them reversed also. Easy to get them wrong.I think they are the water temp and IAP? Maybe,maybe not.

Those two plugs are correct. Just verified.
Tip over sensor is correctly oriented.
Title: Re: Hayabusa - Won't start ?
Post by: Doug Heim on August 23, 2009, 10:01:22 PM: was master correct on what the plugs were for? Id like to know for when I do my wiring. I was not aware although I did keep my harness whole and everything is plugged in still becides what goes to the engine. Ill watch for that. Thanks for the info
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 10:04:38 PM: Quote from: Doug Heim on August 23, 2009, 10:01:22 PM
was master correct on what the plugs were for? Id like to know for when I do my wiring. I was not aware although I did keep my harness whole and everything is plugged in still becides what goes to the engine. Ill watch for that. Thanks for the info

Just watch the colors and you'll be fine. The plugs on my harness and engine are not interchangeable. They physically won't interchange.
Title: Re: Hayabusa - Won't start ?
Post by: Doug Heim on August 23, 2009, 10:06:24 PM: excellent. Thanks, Wish I was of more help but I have yet to wire my first busa yet.
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 10:08:16 PM: It sucks bud. Samantha doesn't understand "normall" start up issues!!!!!!!!!!!
Title: Re: Hayabusa - Won't start ?
Post by: Doug Heim on August 23, 2009, 10:09:00 PM: good way to learn I guess huh?
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 10:10:12 PM: Quote from: Doug Heim on August 23, 2009, 10:09:00 PM
good way to learn I guess huh?

Very dis-appointing lesson............
Title: Re: Hayabusa - Won't start ?
Post by: Doug Heim on August 23, 2009, 10:12:09 PM: Life is full of dis-apointment so why not start to learn early ::). It will work out and she will forget all about it when the foot hits that gas and the clutch drops!
Title: Re: Hayabusa - Won't start ?
Post by: Lance-W on August 23, 2009, 10:14:41 PM: Quote from: Doug Heim on August 23, 2009, 10:12:09 PM
Life is full of dis-apointment so why not start to learn early ::). It will work out and she will forget all about it when the foot hits that gas and the clutch drops!

Just a few huh! But your right as soon as she feels the thing forcing her back in that seat she'll forget all about it like we all do !!!!!
Title: Re: Hayabusa - Won't start ?
Post by: Reidy02 on August 24, 2009, 04:44:11 AM: Yeah ya wont be able to wipe the smile off her face fa at least two days!!
Title: Re: Hayabusa - Won't start ?
Post by: Carlriddle on August 24, 2009, 05:44:45 AM: Like this..........