Bike No Worky - Ducati.ms - The Ultimate Ducati Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old Apr 16th, 2012, 3:07 pm Thread Starter
Member
 
Join Date: Aug 2007
Location: Endicott, NY, USA
Posts: 39
Bike No Worky

I'm looking for some input on non-running ST4s. I just got back from a ride where the bike just quit on me. I attempted to start it once I got pulled over and it turns over well but just won't start. While cranking it seems to turn over faster when I open the throttle. The dash appears to work fine; the clock is operational, fuel gauge looks right, temp gauge is reading properly.

It seems like a fuel pump problem but I'm very worried that its the ECU. At this point I haven't been able to diagnose anything as its still at a dealer that picked it up for me.

Any thoughts?

thanks, Dan

'04 ST4s
'04 VFR - sold
jobslob is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old Apr 16th, 2012, 3:25 pm
Mr Leakered
 
tonered's Avatar
 
Join Date: Jul 2008
Location: Lynnwood, WA, USA
Posts: 7,941
Images: 21
Fuel line popped or split. Seeing a lot of swirling action with the lid open and the key turned on will usually confirm it.

Curious, do you recently fill up? It seems to happen most often with a full tank.

Have a good one.

tony b
2001 ST4 - Thumper
2013 Ural GearUp - Taildragger
tonered is offline  
post #3 of 13 (permalink) Old Apr 16th, 2012, 3:30 pm
Member
 
stryder's Avatar
 
Join Date: Aug 2005
Posts: 7,733
If not a burst or spit off fuel line in the tank, it may be that the crank position sensor is swarfed up, and needs to be wiped off. Good luck.

Regards,

Frank, '05 ST3, (Red!!)
"Veni, Vidi,....Ducati!!"
stryder is offline  
post #4 of 13 (permalink) Old Apr 16th, 2012, 3:33 pm
Senior Member
 
Join Date: Aug 2007
Location: Atlanta, GA, USA
Posts: 263
Quote:
Originally Posted by tonered View Post
Fuel line popped or split. Seeing a lot of swirling action with the lid open and the key turned on will usually confirm it.

Curious, do you recently fill up? It seems to happen most often with a full tank.

Have a good one.
+1 on that... if it were the ECU I would expect to see coughing and stumbling on start up with either an extremely lean, or rich running condition...

Listen for the pump priming when you turn the key to see if you hear anything at all... if you don't, try swapping the relays (fan to fuel pump) to see if that gets it the pump working....

'08 848, Red (Termi's.. not much else needed)
'01 ST4, Blue (Arrow Pipes, Ohlins Rear Shock, Alum. Swingarm, DD Headlight, CRG Levers, CycleCat Risers)
'02 Monster 750S i.e., Senna (Remus Pipes, Rizoma Triples & Clip-ons / Belt Covers/ Mirrors/ Sprocket Cover)
ducati_750 is offline  
post #5 of 13 (permalink) Old Apr 16th, 2012, 3:42 pm
Senior Member
 
Stick's Avatar
 
Join Date: Mar 2004
Location: Greater Worcester Area, Massachusetts, USA
Posts: 2,501
Could be the pump. We trouble-shot a stranger's ST4s at the Dragon a couple years back. Gent filled up, bike didn't start. No F.Pump noise...traced voltages all the way to under the tank connector. Finally slapped the tank while he turned the key on--pump came on, and he was a very happy camper!!

Stick

Try this home-cure-all: Shove a DUC between your legs.

Present DUC: 2003 ST4S Yellow! 2001 ST2 Blue
Past DUCs: 1998 ST2, 1981 500SL Pantah, 1985 MHR Mille, 1987 Paso Limited, 1995 916 mono
Other brands (past):
1978 BMW R100RS Motosport, 1978 R100S, 1981 Moto Guzzi V50 Monza, and a long list of Hondasakizukis
Stick is offline  
post #6 of 13 (permalink) Old Apr 16th, 2012, 3:46 pm
Mr Leakered
 
tonered's Avatar
 
Join Date: Jul 2008
Location: Lynnwood, WA, USA
Posts: 7,941
Images: 21
Ducatidiag will also run a long fuel pump test that you can peek around while it is running.

Have a good one.

tony b
2001 ST4 - Thumper
2013 Ural GearUp - Taildragger
tonered is offline  
post #7 of 13 (permalink) Old Apr 16th, 2012, 3:54 pm Thread Starter
Member
 
Join Date: Aug 2007
Location: Endicott, NY, USA
Posts: 39
Thanks for the quick replys. I did just top off the tank 2-3 miles before it quit. I did stop at a bike shop for about 10 minutes between the fill up and having it quit. I was also in the tank this winter to replace the fuel filter so its certainly conceivable something came off in there.

I'll be sure to check all of that when I get it back home.

'04 ST4s
'04 VFR - sold
jobslob is offline  
post #8 of 13 (permalink) Old Apr 16th, 2012, 4:00 pm
Mr Leakered
 
tonered's Avatar
 
Join Date: Jul 2008
Location: Lynnwood, WA, USA
Posts: 7,941
Images: 21
I’ve had to learn to really crank down on the hose clamps. More than I feel okay about.

Have a good one.

tony b
2001 ST4 - Thumper
2013 Ural GearUp - Taildragger
tonered is offline  
post #9 of 13 (permalink) Old Apr 16th, 2012, 4:20 pm
Senior Member
 
Join Date: May 2009
Location: Charlotte, NC, USA
Posts: 138
replace the front left relay....or swap it with the one below and see if it fires.

Those who dance are considered insane by those who can't hear the music.

2002 Ducati ST4S
volleykinginnc is offline  
post #10 of 13 (permalink) Old Apr 16th, 2012, 10:38 pm
Senior Member
 
Join Date: Aug 2010
Location: Loveland, Colorado, USA
Posts: 182
Quote:
Originally Posted by volleykinginnc View Post
replace the front left relay....or swap it with the one below and see if it fires.
This +1

Or try the fuel pump relay under the seat.

2002 ST4s, 2004 BMW R 1100 S
KarlFitt is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ducati.ms - The Ultimate Ducati Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: Ducati 848 or 1098 track bike/road bike das134 Bikes 0 Aug 7th, 2011 4:07 pm
Wich bike to turn into a race bike Filantroop Superbikes 27 Jan 6th, 2010 9:27 am
buying first bike, ducati or japanese starter bike? audi15psi Ducati Motorcycle Chat 33 Jul 17th, 2008 10:30 pm
fuel pump no worky Bevel-Heaven Superbikes 8 Mar 18th, 2007 2:28 am

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome