Bike Turns Over but Won't Start

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RosscoB
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Bike Turns Over but Won't Start

Postby RosscoB » Thu Nov 03, 2011 1:32 am

I'm having trouble that I hope someone can help with.

My bike will crank, but it won't start. I've checked all the normal stuff.

Bike in Neutral
Kick Stand Up
Clutch In

I've also connected Tune ECU and found no trouble codes. I used the test function to check the fuel injectors, fuel pump, and ignition coils, all of which passed.

I will get an FI light when I hold the starter button in, but I'm not getting any error codes.

Help Please!

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Crotchrockety
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Re: Bike Turns Over but Won't Start

Postby Crotchrockety » Thu Nov 03, 2011 2:51 am

Tip over sensor?
08 Superduke

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Re: Bike Turns Over but Won't Start

Postby jmann » Thu Nov 03, 2011 3:38 am

Crotchrockety wrote:Tip over sensor?


+1

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RosscoB
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Re: Bike Turns Over but Won't Start

Postby RosscoB » Thu Nov 03, 2011 4:07 am

Crotchrockety wrote:Tip over sensor?


Thanks for the tip (grin). I just read the service manual regarding the starting system, and it looks like the bike won't turn over if the tip switch is bad, essentially making certain voltage can't get to the starter motor. In my situation, the starter motor runs and the bike turns over, but won't start. Of course, it's very possible I am not reading this wiring diagram correctly.

Are there any other safety features that would interrupt either ignition or fuel and allow the bike to turn over?

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Re: Bike Turns Over but Won't Start

Postby jmann » Thu Nov 03, 2011 4:56 am

No. My memory for tip over problems is that the bike will turn over but not necessarily run and/or the bike will run for a few seconds then turn off.

You can just unplug the switch and it may run Ok. Doing this will lead to the F1 light eventually indicating a problem but the bike is usable with the switch disconnected.

If you disconnect and have the same symptom then obviously just look elsewhere.

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Re: Bike Turns Over but Won't Start

Postby kowekiller » Thu Nov 03, 2011 5:12 am

I just ran into the same problem. Don't try and start your bike with the headlight mask down.lol
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RosscoB
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Re: Bike Turns Over but Won't Start

Postby RosscoB » Thu Nov 03, 2011 12:34 pm

Thank you for the help. I'll test the tip over switch this evening and let you know how it goes.

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Re: Bike Turns Over but Won't Start

Postby No. 47 » Thu Nov 03, 2011 1:09 pm

Check the manual but I think a faulty tip over switch will produce one of two error codes - is the fuel pump firing up 'cos it could be a blown fuse for ,and/or corroded connectors to, the fuel pump if not (no error codes)?
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Re: Bike Turns Over but Won't Start

Postby RosscoB » Thu Nov 03, 2011 1:18 pm

No. 47 wrote:Check the manual but I think a faulty tip over switch will produce one of two error codes - is the fuel pump firing up 'cos it could be a blown fuse for ,and/or corroded connectors to, the fuel pump if not (no error codes)?


I'm not getting any error codes, fuel pump cycles when the key comes on and passes tests with Tune ECU.

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Re: Bike Turns Over but Won't Start

Postby No. 47 » Thu Nov 03, 2011 1:38 pm

Check QR fuel line connector at the rear left hand side of the tank?
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Re: Bike Turns Over but Won't Start

Postby RosscoB » Thu Nov 03, 2011 1:50 pm

No. 47 wrote:Check QR fuel line connector at the rear left hand side of the tank?


Is there anything specific I should be checking it for? It is connected and is not leaking. I did fiddle with it a bit after the last time I rode because it looked like the lock wasn't fully engaged.

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Re: Bike Turns Over but Won't Start

Postby Crotchrockety » Thu Nov 03, 2011 2:17 pm

Well, its either gas or spark that's missing. When you crank it, do you smell gas in the exhaust? If so, and its not even attempting to fire, it is probably a spark issue. If you don't smell gas, then its probably not getting fuel. You could also pull the plugs and check to see if they are wet and/or are firing.
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Re: Bike Turns Over but Won't Start

Postby samba » Thu Nov 03, 2011 2:21 pm

I'm assuming since you have TuneECU that you're not running a PCIII? Whether you are or not, try unplugging the BGC (big grey connector - if you're not sure what that is, it's the one behind the rad on the RHS), cleaning and reconnecting it.
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Re: Bike Turns Over but Won't Start

Postby No. 47 » Thu Nov 03, 2011 3:07 pm

RosscoB wrote: I did fiddle with it a bit after the last time I rode because it looked like the lock wasn't fully engaged.


That sounds like it could be your problem - fiddling with something after it was working and now it's not - did you fiddle with anything else? If not, suggest fully disconnecting the QR fuel line and reconnecting - it needs to be properly seated/connected.
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Re: Bike Turns Over but Won't Start

Postby jmann » Thu Nov 03, 2011 6:16 pm

No. 47 wrote:
RosscoB wrote: I did fiddle with it a bit after the last time I rode because it looked like the lock wasn't fully engaged.


That sounds like it could be your problem - fiddling with something after it was working and now it's not - did you fiddle with anything else? If not, suggest fully disconnecting the QR fuel line and reconnecting - it needs to be properly seated/connected.



Hang on here. RosscoB what are you talking about when you say fiddling. Are you talking about the quick release fuel line connector under the rear of the tank or the filler cap lock? If the former then making sure it is properly seated is good advice. If the latter, then perhaps you have been pushing down on the tank and pinched a breather pipe. What exactly is the history of fiddling here?

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Re: Bike Turns Over but Won't Start

Postby RosscoB » Thu Nov 03, 2011 9:34 pm

AND THE FINAL ANSWER WAS: RE-CONNECT THE FUEL LINE ON THE LEFT SIDE OF THE BIKE.

When I was changing the clutch fluid, the quick release appeared to be loose so I pushed the metal prong in. I didn't hear a pop and no fuel spilled, but that was enough to cause the problem.

I also learned that the bike will not crank with the tip over sensor unplugged.

THANK YOU ALL FOR YOUR HELP!!!!

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Re: Bike Turns Over but Won't Start

Postby lcjohnny » Sat Nov 05, 2011 1:00 am

Rossco
thanks for posting the resolution :)
helps us to learn and grow as a forum

Glad its making you smile again

JOn

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Re: Bike Turns Over but Won't Start

Postby KTMnewb » Mon Dec 19, 2011 10:22 pm

know you already solved the issue but i had the same problem and thought i would just throw my solution out there.

make sure all your connections are good. in my case the ring connector at the batters had broken inside the little plastic sleeve so looking at it you wouldn't know. i even wiggled it and seemed fine. finally when i disconnect the battery to get it tested, the ring had just fallen off. hope that makes some sense and helps someone else!

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Re: Bike Turns Over but Won't Start

Postby WVhillbilly » Mon Sep 04, 2017 5:23 pm

OK, I've had this problem a couple times recently.
Crank, won't start.
Only thing I've changed was the battery and oil of late, aside from that the bike has been perfect.

Battery took a dump, replaced with a new one and left on the battery tender overnight.

The next morning the bike fired right up without a problem, ran great.

A week later (Saturday morning) cranks fine, won't start. Had other shit to do so I didn't bother with it.

A half hour later, turn key on, push button and the bike starts right away.

Yesterday, the same thing.

Changed the oil, bike started right up. Shut it off to make sure the level was good and it started again no problem.

This morning I was going to go for a ride. Nope, won't start.
An hour later, it will start without issue.

I hear the fuel pump cycle normally when I turn the key on. without tearing into the bike (which I don't have time for) does anyone have an idea of where to start?

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Bike Turns Over but Won't Start

Postby Sarasota_Steve » Mon Sep 04, 2017 9:50 pm

WVhillbilly wrote:OK, I've had this problem a couple times recently.
Crank, won't start.
Only thing I've changed was the battery and oil of late, aside from that the bike has been perfect.

Battery took a dump, replaced with a new one and left on the battery tender overnight.

The next morning the bike fired right up without a problem, ran great.

A week later (Saturday morning) cranks fine, won't start. Had other shit to do so I didn't bother with it.

A half hour later, turn key on, push button and the bike starts right away.

Yesterday, the same thing.

Changed the oil, bike started right up. Shut it off to make sure the level was good and it started again no problem.

This morning I was going to go for a ride. Nope, won't start.
An hour later, it will start without issue.

I hear the fuel pump cycle normally when I turn the key on. without tearing into the bike (which I don't have time for) does anyone have an idea of where to start?


Sounds like a bad grounding connection somewhere. One of those that's hard to diagnose.
I had something very similar on my SV 650 and I ordered and replaced the starter solenoid only to find a very loose 30A fuse in the old solenoid. :( I guess we need to check the obvious stuff before replacing parts.
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Re: Bike Turns Over but Won't Start

Postby WVhillbilly » Tue Sep 05, 2017 1:49 am

I did some more reading after I posted.
I need to check the BGC under the tank I think.
It did this before, a few years ago. Then before I looked at it further it was running fine, so I didn't have to dig into it.

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Re: Bike Turns Over but Won't Start

Postby WVhillbilly » Mon Oct 30, 2017 10:46 pm

OK, cleaned and lubed the BGC.
Still cranks, but won't start. Then later, maybe it will, or maybe it won't.

I replaced the battery before this shit started with a cheap battery. Could this be it?

It stays on a battery tender, so it's charged. But is it possible that a cheaper battery just doesn't have enough ass to start the bike?

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Re: Bike Turns Over but Won't Start

Postby Joe Biker » Tue Oct 31, 2017 2:49 am

If you have any add ons I would start there first?
Power commander ?
If it cranks it’s not the battery unless it’s cranking slow !!!!
When it cranks do you have spark?
If you have spark I would look to see if a plug is fouled.

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Re: Bike Turns Over but Won't Start

Postby WVhillbilly » Thu Nov 02, 2017 1:33 am

No add ons.
Not cranking slow, fuel pump is running.
Don't know about the plugs, I didn't think of this until after I'd left home for work.

Currently working a couple hours from home and not making the drive every day so I won't get to look at it until this weekend.
I just know that these things can be a bit hard on the battery, and thought that a cheap battery might have enough juice to crank, but not run the ignition properly.


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