M800 engine died while riding, can't restart...

[rkundrat]

On way home today, the bike was running flawlessly. While cruising along at an even 40mph, the engine started to loose power. Twisting the throttle did nothing. Over only about 3 seconds did I start to feel this and the engine was dead, very quick.

I coasted to the side. And could not restart. Engine is cranking and turning over just fine, but it's not firing. Turning the key I can hear the fuel pump whir and see gas moving in the tank. I pulled a plug and checked for spark while cranking, it sparks. So now where do I look?

Thanks,
Ryan

[battlecry]

From what you describe, it rules out my first guess, the injection/ignition relay.  I know it is a pain, but can you unhook the PCIII injector connectors and try to start the bike without the PCIII in the loop?  I had two of them go bad on me a few years ago. 

[Howie]

Check the fuel lines inside the tank.  You may have a line that is damaged.

[rkundrat]

I tried pulling one off and connecting the stock injector harness directly which did not work. I thought if the PC failed the signal would simply flow through the PC wiring and run as if there wasn't one on there, no?

[battlecry]

In my experience it doesn't work like that.  The PC uses the injector pulse as the source of energy for it to work and produce the tuned pulse.  Note that it has a ground wire but no positive,  it gets the positive from the injector pulses prepared by the Monster's ECU.  When my PCs stopped working the engine would not run. 

Check what Howie says.  Something may have clogged/failed in there.

Is your battery voltage healthy?

It wouldn't crank with a failed kill switch.   A bad neutral switch would not kill your engine.  If it were a GTV, I'd open the hood and reattach the loose low tension lead to your ignition coil and start the car.  I'm drawing a blank here.

[Speeddog]

Check the fuel lines inside the tank.  You may have a line that is damaged.

+1

[rkundrat]

Battery is very healthy, turns the engine over briskly without any trouble.

Well that give me two things to check when I get the bike back to my garage tonight (maybe it will tun into a GTV in the mean time...) Fully disconnect PC and inspect fuel lines in the tank. I'll report back with what I find, Thanks!

[battlecry]

These two threads may be of interest, regarding the fuel hose issue:

http://ducatimonsterforum.org/index.php?topic=24473.0

http://ducatimonsterforum.org/index.php?topic=35764.0

[Speeddog]

This one in particular:
http://ducatimonsterforum.org/index.php?topic=24473.msg429458#msg429458

[rkundrat]

That's some nasty looking hose...

Bike was dropped of tonight by a friend with a trailer, so I'll see if the PC is lighting up for starters (hidden under the side cover, so I couldn't see if it was active on the side of the road. now packing an allen key set...) Taking the PC out of the loop should be a quick check. If I still get no start, These fuel hose links will be quite helpful after I drain the tank and open it up. Thank you all!

[Speeddog]

No need to drain the tank.

[rkundrat]

No need to drain the tank.

Even better, thanks!

[rkundrat]

I removed the entire tank cap, got a good look into the tank and saw the line to the fuel filter disconnected... Checked all the hoses while in there and they appear to be in great shape. Reattached the line and it fired right up. Thank all!    [moto]

[causeofkaos]

man i love this forum!!!