fuel lines

[jaxduc]

****new problem****
HELP

i thought the bike was starting but it sputters after about 5 seconds and dies.
So I've reversed the fuel lines and had the same problem.
the new thing i've noticed is when i turn on the ignition the fuel pump sounds VERY different.
in stead of sounding like Zzzrrrrrrrrrrrrrr like it usually sounds, it makes a louder SSSSHHHHHHHHHHh sound (it made this sound with the fuel lines switched around both ways)
I can post a video later but the bike is obviously not getting fuel and will start only for a while with the residual fuel in the lines.

There is nothing more depressing than not being able to start your bike and not knowing why, and I'm kicking myself because if only I had taken 2 seconds to mark the lines.

working with the tank on the new gen monsters is a PITA (no kickstand) and sharp metal under sides which makes this soooo much more annoying.
Thanks for any input/opinion.

[suzyj]

Are ya sure there's enough fuel in the tank? Mine makes a very different noise when the fuel level is below the pickup.

[jaxduc]

Trying my best to not be offended here.
Yes the tank is half full/empty

[krista]

Dude, it's something else. I'm almost 100% sure it doesn't matter how the hoses are hooked up on the new bikes. They're an open loop. I have about 30 throttle bodies on a pallet I bought off eBay for TPS and injector research...

[jaxduc]

Dude, it's something else. I'm almost 100% sure it doesn't matter how the hoses are hooked up on the new bikes. They're an open loop. I have about 30 throttle bodies on a pallet I bought off eBay for TPS and injector research...

An loop is what I'm thinking.
Maybe its a kinked hose or a bad connection on the quick disconnects?

[ducpainter]

An loop is what I'm thinking.
Maybe its a kinked hose or a bad connection on the quick disconnects?

What did you do when you had the tank off?

Did you go inside?

[jaxduc]

No. Did not disassemble anything in the pump or tank. Only disconnected the quick disconnects.
(I was wrapping my exhaust and wanted more room to work with) why I removed the tank.

[ducpainter]

I have limited experience with q/d's.

Usually they leak if you don't get it right. My tech advises lubing the o-ring on reassembly to avoid tearing.

I always re-trace my steps if all of a sudden something I messed with doesn't work anymore.

BTW...sorry about the earlier misinformation about the lines. I was basing it off the early bikes.

[kokis]

Battery?

[jaxduc]

Ive never considered anything on this board misinformation.
It js a godsend.
I'll try to take the tank of Yet Again and do a better inspection.

[krista]

+1 to lubing the QD o-rings. I always add grease to them. The only times they've torn for me is when I haven't added grease. That's part of why we sell those now. Plus ours are Viton. Ducati (and most manufacturers) are not super aggro about using Viton for sealing rings. Viton has about 100 degrees superior temperature range and much longer resistance to fuel than plain BUNA o-rings.

[jaxduc]

I'll be buying some from you today chris

[kokis]

So what is your problem? Gas leak? Or poor pump work?
How does light work? Is your battery ok? Pump sounds bad when battery discharged. Also M696 can give HI BATT error on low battery.

[jaxduc]

I found the issue:



this kink was hiding under one of the tags/labels on one of the fuel line. I temporarily fixed the kink, put the tank on, attached the quick connects and bike started but sputtered and shut off.
I then swithced the in/out fuel lines and the bike STARTED and ran for 10 minutes with no problem.
I believe our suspicions were correct. DP was correct and there was no "mis-information" given. As for my experience, the fule lines can not be switched. However I still don't see anyting identifying on the lines which one goes where. The pump itself is labeled "in" and "out" though.

Its always the most simple things.................

[jaxduc]

I knew it wasn't:  Gas leak, fuel pump, the light?, the battery, or a poor connection on the connections. the problem was so simple I didn't even consider it (also it was hiding in a pretty good spot so I don't feel so bad).

a quick note about these fuel lines on the new gen monsters (I'm not sure if they are the same on the older ones)
they are obviously prone to kinking, so beware when taking the tank off.
They're made of a more stiff plasticky material different from the ones I've seen. I have always seen fuel lines be the more rubbery type and have never seen them kink like this.
I might be replacing the stiffer hoses with the more common rubbery ones. Does anyone see this being a problem?

I'm so releived.