Wont start
 

is there a definitive list somewhere of what to check if your bike wont start?

So far:
Battery - fine, given extra juice of seperate battery as well
fuel pump - changed tank and still wont start, fule pump sounds like it is doing its thing.
Fuses - fine
Side stand cut out annoying plug thingy - fine
On off switch - on
Spark plug ht leads - fine
Power commander - lighing up as it should
Starter - cranking away as it should
ECU - seems fine. With throttle open, bike tries harder to start etc.
Fuel line, changed last year - therefore new(ish)
Could the fuel filter get blocked?
Both coils done in
Relays? if so how to check and which one
???

Im no expert and i expect someone with more knowledge will be along but you can try switching the relays around.

Another problem could be immobilizer

i had this a couple of years ago - turned out to be a wire from previous owners alarm (removed) that hadn;t been sealed. Corroded back to to the main wiring and the alarm was wired into the killswitch circuit. Well worth checking and also look at the large round connector block just inside the frame neaxt to the cam cover?

no immobiliser fitted

smilo which model is you have as this section covers 748 to 998 and those two have completely different ECUs and can suffer from different problems.

I would start by checking for a spark and if fuel was getting through, easy if you know what your doing not so easy if you don't.
If its cranking over and you have no reason to suspect the ignition/spark then a few drops of fuel down the inlets can often help, if it starts then its the fuel not getting through the injectors for one reason or another.

999s engine....04/05
Thanks for that.

to check the spart, plug out and start it with the plug against the cylinder head, correct?

If the fuel is getting through wont you see the injectors spraying fuel into the inlets with the tank partially removed? Or is it too fine for that.

I think a list to add to the site would be in order after this.

Wrong section then fella. This is 748 to 998. For a 999 you want to post here:

http://www.ducatisportingclub.com/forumdisplay.php?f=84

Thread now moved to the 999/749 section.

Ducati 999 Starting Problems
 

Engines need more fuel for a cold start because there is no heat in the ports and chambers to keep the fuel atomized as vapor, so it stays as a liquid. Fuel as a liquid burns very badly in the combustion chamber, so throwing extra fuel at it ensures enough stays as vapor for some sort of combustion. Too much fuel and you foul the plugs.

One of the problems with shower-type injected bikes like the 999 is HOW you start bike can result in problems. You can easily flood or foul plugs with shower injectors because much more of the initial fuel spray from shower injectors condenses on the cold surfaces of the throttle bodies and intake tracts before it can get down into the combustion chamber to aid startup.

So the method of starting is different.

In particular, do not open the throttle or engage the fast idle lever until the engine fires up. You must simply hit the starter button and wait for the engine to come to life. Attempting to crack the throttle open will only force you to run the starter motor longer (and possibly drain the battery). Once the engine begins to idle, you can open the throttle or fast idle lever at any time.

999s engine which is a 998s engine basically, the rest of the bike is 998 and it is unlikely the problem is with the "metal". moved back