Cutting out at 7k

[M9a9t6tS]

Hi all new to the forum and the ducati and it isn't going well!

Just wondering if anyone could shed some light on the situation, i've have the 996s for about 2 months now, in that time its been running pretty badly, It runs fine when cold but just seems to degrade the longer you ride. It lurches at 3.5k and is violently jerky at the top end of the rev range and doesn't seem to want to accelerate, at the same time whilst off the throttle i've been loosing all electrics. All the lights have been flickering, headlight and rpm gauge followed by a hefty backfire.
In the last couple of days i've been playing the the idler screw in the ecu and by leaning it out, through trial and error, it seems to be running a lot better, not perfect but better, however its unmasked this cutting out problem which happens at 7000rpm.

When your revving up through 7k its fine, also as you gradually slow down through 7k it appears to run as it should. If I slam the throttle shut the revs die normally, until you hit the 7k mark, which is when the lights flicker off and rpm gauge drops out erratically and it backfires. Once the revs have reached 6-6.5k everything returns to relative normality.

I've got a few theories but if anyone could offer their thoughts it would be appreciated!!!

The bike is fitted with 50mm termi race pipes with the vertical link pipe connected to the standard header and down pipes, the previous owner, who was someone from this forum, assured me it had the correct eprom chip fitted so i'm going with that. I've got a power commander on the way to hopefully sort out the fuelling but the electrical issues still remain!!

[The Dieselinator]

Hi welcome to the site. Sorry that your first post is about a fault and not about how good it is. Sadly I can't help with your problem but someone will be along soon who I'm sure will help.

Also, whereabouts are you based?

[Bungi]

Originally Posted by M9a9t6tS

Hi all new to the forum and the ducati and it isn't going well!

Just wondering if anyone could shed some light on the situation, i've have the 996s for about 2 months now, in that time its been running pretty badly, It runs fine when cold but just seems to degrade the longer you ride. It lurches at 3.5k and is violently jerky at the top end of the rev range and doesn't seem to want to accelerate, at the same time whilst off the throttle i've been loosing all electrics. All the lights have been flickering, headlight and rpm gauge followed by a hefty backfire.
In the last couple of days i've been playing the the idler screw in the ecu and by leaning it out, through trial and error, it seems to be running a lot better, not perfect but better, however its unmasked this cutting out problem which happens at 7000rpm.

When your revving up through 7k its fine, also as you gradually slow down through 7k it appears to run as it should. If I slam the throttle shut the revs die normally, until you hit the 7k mark, which is when the lights flicker off and rpm gauge drops out erratically and it backfires. Once the revs have reached 6-6.5k everything returns to relative normality.

I've got a few theories but if anyone could offer their thoughts it would be appreciated!!!

The bike is fitted with 50mm termi race pipes with the vertical link pipe connected to the standard header and down pipes, the previous owner, who was someone from this forum, assured me it had the correct eprom chip fitted so i'm going with that. I've got a power commander on the way to hopefully sort out the fuelling but the electrical issues still remain!!

ok its a long shot but if it runs ok when cold then try replacing the ecu sensor which is located near the thermostat - its the small square one.

id try this first on your discription. these do fail from time to time

[M9a9t6tS]

Based near swindon, so i'm got riders of bristol or Motorapido as my nearest dealers.. as far as i know!

Will have a look at the ecu sensor and see how that goes, getting the feeling i'm going to have to take it to a stealer!!

[900streetfighter]

Try this. open your fuel cap and with a fairly full tank, turn on your ign. so the fuel pump primes. look for bubbles coming up in the fuel. if so you have a hole or split in the pipes to and from the fuel filter. that would cause similar probs to the running as you described.

[M9a9t6tS]

took bike to dyno today and all the problems are sorted which is nice, it was a combination of incredibly bad fueling and a dodgy datatool alarm which was cutting out the ingnition circuit. Needless to say it has now been urinated upon and the incinerated! thanks to Projex, Cradley Heath near Brum for diagnosing it on the spot and correcting the fuelling! The bikes pulling like a train now, bring on the Alps!!

[The Dieselinator]

Originally Posted by M9a9t6tS

took bike to dyno today and all the problems are sorted which is nice, it was a combination of incredibly bad fueling and a dodgy datatool alarm which was cutting out the ingnition circuit. Needless to say it has now been urinated upon and the incinerated! thanks to Projex, Cradley Heath near Brum for diagnosing it on the spot and correcting the fuelling! The bikes pulling like a train now, bring on the Alps!!

That'll be Kev at Projex then. A few of us from here went to a Dyno day he held last year. Looking forward to doing another one. What power did you get?

[RWD_cossie_wil]

Well matts bike made 114 bhp in the end, which is just about right. However the bike is a totally different animal now, it rides beautifully from a closed throttle to the limiter. The fuelling was shocking before, as was mine, it seems to be a bit of a ducati trait to be very lean! Kev was amazed that the bike was still running it was so lean!

I will post the graphs up later, and just like my 996, the difference is night and day! If you want a sweet riding Ducati, get a power commander and a live dyno tune, Kev really knows what he is doing, and was an absolute star today for sorting Matts bike out with all the alarm troubles and still only charging the standard mapping fee!

Top service, and a very freindly guy as well.

When do we fancy another dyno day? I will sort out as it was a cracking day last year!

[Sheffield Horseman]

Originally Posted by M9a9t6tS

Hi all new to the forum and the ducati and it isn't going well!

Just wondering if anyone could shed some light on the situation, i've have the 996s for about 2 months now, in that time its been running pretty badly, It runs fine when cold but just seems to degrade the longer you ride. It lurches at 3.5k and is violently jerky at the top end of the rev range and doesn't seem to want to accelerate, at the same time whilst off the throttle i've been loosing all electrics. All the lights have been flickering, headlight and rpm gauge followed by a hefty backfire.
In the last couple of days i've been playing the the idler screw in the ecu and by leaning it out, through trial and error, it seems to be running a lot better, not perfect but better, however its unmasked this cutting out problem which happens at 7000rpm.

When your revving up through 7k its fine, also as you gradually slow down through 7k it appears to run as it should. If I slam the throttle shut the revs die normally, until you hit the 7k mark, which is when the lights flicker off and rpm gauge drops out erratically and it backfires. Once the revs have reached 6-6.5k everything returns to relative normality.

I've got a few theories but if anyone could offer their thoughts it would be appreciated!!!

The bike is fitted with 50mm termi race pipes with the vertical link pipe connected to the standard header and down pipes, the previous owner, who was someone from this forum, assured me it had the correct eprom chip fitted so i'm going with that. I've got a power commander on the way to hopefully sort out the fuelling but the electrical issues still remain!!

Hi. is this the bike you've advertised for Sale the day after this post?

Only just found this thread after some searching as I mistakenly thought I'd sent you a PM about your Ducati 996 you advertised and have been waiting for a reply.

So now you have it sorted...you aint selling ?
.

[M9a9t6tS]

That was a year ago! lol
But yeah this is the same bike if your interested..