Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 999 / 749 > poor running

[gh999]

thanks will try that also . just annoying that you get all suited up ready for a cool down run out and this happens ! got full spark there , it seems like a fuelling problem as i can smell petrol from out of the exhaust.

[IainMac]

After my 600 mile service the fuel pipe was getting crushed on to the rear cylinder head nuts. Check that its routed around the nuts not over them. This lead to fuel starvation on mine, noticable as a flat spots on accelleration. Though if you can smell fuel it sounds like its not firing or too rich. is the choke cable routing ok (not on permanently)

[gh999]

had tank off ... checked pump and filter . wd 40'd every block connector i could find . still there ! as i've not used the bike for couple of months ... could fuel have gummed up a bit and blocked injectors ? will get some injector cleaner tommorrow

[djb]

presumably plugs okay?

throttle balance?

I'll shut up now....

D

[Brian_999s]

I have the same problem with mine last week it just started missing a beat every now and then now i cant even get it to the end of the road, I have tryed the coils and there both ok tested with me mates coils and it still does it. Also it you watch the engine management light comes on then goes off every now and then.

[JPM]

My coils went after 300 miles so it is possible!Secondly if you've had the tank off I hope you've reseated the tank correctly and got the fuel lines back into the reservoir under the tank, as one issue is the fuel lines press on top of the rear coil and vibration can cause an issue...

[Brian_999s]

I have popped to the local bike shop and purchased some new plugs but here is the problem the old ones in the bike are Champion and the only ones i could get were NGK (equiverlent to Champion plugs)and you cant tighten them down propper coz the nut bit isnt long enough like on the champion plugs.

This is doing me heeed in and its perfect riding weather i am missing

[gh999]

took plugs out .... as black as a polish miners face ! cleaned em , more wd40 to coil caps , and some redex injector cleaner in tank .......... and my beauty is back terrorising the neighbourhood ! thanks to all for the little nuggets of wisdom . new plugs will be got tommorrow.

[Brian_999s]

dont get NGK ones