Ducati 999 - misfire /horizontal cylinder
 

Hi

I hope someone out there can help me, i bought a Ducati 999 in December 2002, and it has recently developed a misfire horizontal cylinder when cold. Hope you can HELP ME

take the plug cap off the front cylinder and clean the socket with a little WD40and look inside the receptical for the plug for green oxidization on the pins .
check that the oil cooler fairing hasnt chafed the cable were it runs over the edge of the cylinder head ,
lastly check the plug if the abouve fails

have you just washed the bike or ridden in the rain

sue does it clear up when hot?

does it stop misfiring

on my old 2003 bike i got my dealer to replace both spark plug caps/coils under garantee for the new type fitted to the last 2004 bikes and the 2005 models , easly recognisable by the long lead coming from the plug cap , i had no end of problems with front cylinder misfire

Ducati 999 - misfire /horizontal cylinder
 

Hi

Thanks for the advise, i have had coils changed, and am going to try draining the fuel tank as prone to water ingress, the problem only shows up when the weather is cold. I will keep you updated. Thanks again

Ducati 999 - misfire /horizontal cylinder
 

Hi

Drained fuel tank - no water, not sure what to try next, can anyone else help.

If it was a fuel problem as you are suggesting water, it would misfire on both cylinders! You are saying the front cyl is misfiring right?
Is it a constant misfire of now and then?
If so when does it do it?

You need to inspect all the electrical high tension stuff first like plug, cap lead etc.

This sounds just like the problem encountered by quite a few guys that race the 999. It's also a known issue to Ducati UK. The cure is to replace the stock "all in one" plug cap/coils with the appropriate replacement parts from the 749R.

Hope that helps, Neil.

Ducati 999 - misfire /horizontal cylinder
 

Thanks for advice Neil all the coils have been replaced with 749R, i have also transposed them, and the misfire is still on the No1 cylinder in the cold weather on initial start. I have tried lots and lots of other things and still faulty.

I'm Colin my wife is Sue, we have only just gone on the internet, still trying to find our way around, not set up my e.mail address yet so all replies to Sue Reade please.

I'm working till 9pm tonight, but when i come home, perhaps i can e.mail you to swop info.

Colin

No problem Colin, my e-mail address is on the button below.

Ducati 999 - misfire /horizontal cylinder
 

Hi Neil,

Sorry not e.mailed earlier working late, i will get my notes together later, and e.mail you tomorrow if thats ok.

Colin

Ducati 999 - misfire /horizontal cylinder
 

Hi thanks to everyone out there that has given suggestions to try to sort out the misfire fault.

I have had all the coils replaced with 749R, i have also transposed them and still a misfire on cylinder 1.

I have emptied the petrol tank in case of water.

The problem appears to be related to Air Temp , it only occurs during the cold weather when the ambient air temp is low.

I've pre-heated air box with hot air gun and Bike starts ok, carrying on blowing in hot air during warm up and Bike will reach operating temp with no hint of misfire.

Start Bike normally and starts to hunt after 30 - 60 seconds, blow hot air into air box and hunting clears and runs normally.

My name is Colin, we have only just gone on the internet, and i have not set up an e.mail address for myself yet, so i'm using my wifes ( sue ), and learning 1 finger typing.

Thanks again for all the info.

Colin - very puzzled

if it was my car(audi) id say it was either airflow meter/mucky air filter or air leak thru induction system or may be too much/not enough fuel reaching the head -blocked injector? sorry but dont know much about the ducati system but may lead to solving yur problem-