PLEASE HELP!. Loss of power, no codes, dealership can't pin point (VIDEO ATTACHED)

Ducati Forum

Help Support Ducati Forum:

S

salviche

Joined
Dec 6, 2020
Messages
8
Location
California
Hey guys,

So I have a 959, use it for mainly track. I had a problem that came out of nowhere and cannot fix it.

The bike went to the dealership, where they couldn't find what it is. No codes thrown, and no obvious things to pick on.
The bike runs well until you apply from 90% to 100% Throttle twist. It does it in all 3 riding modes.

R6's pass me on the straight without an issue.

Dealership opened the engine, confirming no shavings, no engine issues, no fuel pump issue, no oil pressure issue. So here we are..

Take a loot at the footage and please let me know if anyone has seen this. The first shot of the video is of how the bike is supposed to sound and rev, the following shots is how it behaves.

1. On full gas it might output 80hp
2. On full throttle twist it completely bogs down
3. All the shots you see on the vid are from 3rd to 4th and it takes forever to climb.
4. The bike starts and runs idle with no issues.
5. No overheating
6. Riding on the street is not a problem (only on full throttle)

 
I would think maybe coils or the injectors are a bit dirty and not spraying enough at high rpm.

@KarlKani uses a 959 for a race/track bike I believe, he may have some insight.
 
They said it has fuel pressure but did they check volume?

It could be fuel, maybe, (screen in tank or injectors plugged) or throttle bodies are not opening all the way (throttle or ecu) or ignition timing if problem is in ecu

Coil easier to rule out than the rest

Good luck
 
salviche said:
2. On full throttle twist it completely bogs down
Click to expand...

That means not enough gas or not enough spark. (or timing of gas/spark), or maybe TC working?
I don´t think it is the spark plugs, but if possible change them.
Have you calibrated MAP, APS & TPS?, if not get it done, you can use Melcodiag for this.

Any change after done the above
 
The clip shows you are in SPORT mode and DTC is at 5 - what electronic settings are you using at the track? Is your dash lighting up indicting DTC often? If you are at the track you should be in RACE and DTC maybe 2 or 1 with slicks.

Assuming its not a simple wrong elec setting
Have you done any tuning on this bike or stock ecu settings? Does the shop have a dyno? Just thinking it would be helpful to see numbers associated with the issue so you can really drill down on what is happening when power wise.
 
KarlKani said:
The clip shows you are in SPORT mode and DTC is at 5 - what electronic settings are you using at the track? Is your dash lighting up indicting DTC often? If you are at the track you should be in RACE and DTC maybe 2 or 1 with slicks.

Assuming its not a simple wrong elec setting
Have you done any tuning on this bike or stock ecu settings? Does the shop have a dyno? Just thinking it would be helpful to see numbers associated with the issue so you can really drill down on what is happening when power wise.
Click to expand...

Hey @KarlKani No Tuning, bone stock. The video at the beginning is from another bike (How its supposed to run). And the passes on the track are mine.

At the track I use EB1 / TC2 / ABS1 With Super corsas, but the problem kicks in on the straights and there isn't even enough power to light up the TC. R6's pass me like 1000's

My next steps are what its mentioned on the above chats, definitely need to Run a Dyno so I can show the folks at Ducati.
 
sota748 said:
That means not enough gas or not enough spark. (or timing of gas/spark), or maybe TC working?
I don´t think it is the spark plugs, but if possible change them.
Have you calibrated MAP, APS & TPS?, if not get it done, you can use Melcodiag for this.

Any change after done the above
Click to expand...

@sota748 Thank you that's where my guesses were too, TC was @ 2 with Super corsas so its for sure internal.

I haven't done any calibrations but that is going to be my next ask when I take it down to the dealership. How do I do it via Melcodiag?
 
from the sound of it , not a lean issue , sounds fat as hell

if it was that lean to effect power like that it would be braking up and bucking not be real smooth and rev out slow

did you try simple things like check the air filter and spark plugs?
 
vcyclenut said:
from the sound of it , not a lean issue , sounds fat as hell

if it was that lean to effect power like that it would be braking up and bucking not be real smooth and rev out slow

did you try simple things like check the air filter and spark plugs?
Click to expand...

Hey @vcyclenut, Sparks are about to be the first thing, and Air filter clean and no suspicious blockage on the air channels that lead to the box. I hope a remap and or reset of MAP, APS & TPS as mentioned by @sota748 will do the trick.

As extra info for all of you reading this. I was on a track day, the first two sessions were perfect, then on the third session this started happening completely out of the blue. Turned bike off after second session, tuned back on and the problem began. So my gut tells me electronics
 
You run race gas outta a 5 gallon pail?

If you been pumping fuel from tank in ground might wanna check the fuel pump pick up

Someone sells a cleanable sock thing as apparently this is common problem now. Good chance yer problem is elec, I know that, but I would still check that screen before I started spending $$$ and/or pulling my hair out
 
@Don14R Only Run standard 91 from the gas station. Dealer "Apparently" checked and there was nothing jamming the filter. Could you point me on how to check it?

Whats that cleanable sock thing?

Thanks man!
 
Think it’s from MWR

Pull tank pull pump

The stuff I seen restricting volume (i have only seen pictures) is clear and sorta slimy looking
 
Ps - iirc there is a second filter INSIDE the pump on the pressure side. Couldn’t put replaceable one in-line right lol. Why Ducati? So if yer p/u screen is full of clear gooey .... you will need to address the pump as well

It’s a long shot but if that were my bike I would be happy if that’s what the issue is : )
 
its not a clogged fuel pump that would cause a fuel starvation issue, it would buck and not pull smooth

the fact that it was fine and then started during a session, points to something related to the ignition or electronics. if you keep riding it , it may get worse and make it easier to diagnose

does it pull cleanly to redline if you only open the throttle approx 60%, do you have access to a dyno where they could check the air fuel ratio

when the bike is cold does it change as the temperature comes up
 
Actually a pick up getting restricted creates the exact symptom he is describing - loss of power at wot

It’s lacking fuel or timing above 90% throttle for some reason...

Just cuz it ran for 2 sessions and the problem started on number 3 does not rule it out
 
salviche said:
How do I do it via Melcodiag?
Click to expand...

Read this
ducatiforum.com

MelcoDiag-Diagnostic Software for the 1199

I've posted this guide on a couple of different forums and I'll post it here as well. It's also available on YouTube in Breaking It Down (Part 10). MelcoDiag Guide for Windows 8.1 This guide will walk you through the steps necessary to get the MelcoDiag software up and running on a PC...
ducatiforum.com ducatiforum.com

If you got a DDA module, you could plug that in when running the bike, sometimes the data from that tells you "the error"
Got a Screenshot somewhere will see if I can find that
 

Similar threads

A
2016 959 Panigale start/idle issue
Replies
4
Views
857
SirJAG
S
S
PLEASE HELP!. Loss of power, no codes, dealership can't pin point (VIDEO ATTACHED)
Replies
1
Views
1K
Don14R
D
K
Intermittent throttle problem
Replies
4
Views
948
Kees Pater
K
O
2023 Streetfighter V4 Euro 5 Tuning
2
Replies
37
Views
5K
Mogsal
M
duc
2023 Ducati Panigale V4R Pictures & Information
2
Replies
25
Views
4K
RickD996
RickD996

Register CTA

Register on Ducati Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions

Back
Top