Full throttle Power loss after 9000 rpm

H

HenrikE

Joined Apr 2024
26 Posts | 3+
Singapore
Hi,
I have a Panigale V4s 2018 that has a power loss at 9k rpm on full throttle. Rides perfectly otherwise.
Only very noticeable on track.
Has Up-map but otherwise stock.
Fuel pump/filter has been tested and not the issue.

Any idea what can cause this power loss?
 

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Yes, very easy. It is only on full load it happens.
btw... Bike only has 9k km and no error codes and ducati can't see what is wrong.
 
Yeah, the “tune” is ....... Flash back to stock and observe. The Throttle(rider demand), ETC/Torque tables are afu.
 
SBK-SP said:
Yeah, the “tune” is ....... Flash back to stock and observe. The Throttle(rider demand), ETC/Torque tables are afu.
Click to expand...

Yes, flash back to stock is next on the to do list.
The throttle control unit has been changed and was not the issue.
 
I take it you didn't flash it then the problem started. Rather, the bike was flashed, ran fine for a period of time, now this problem presented itself. Why would someone conclude the tune is responsible without any further information?
 
bp_SFV4 said:
I take it you didn't flash it then the problem started. Rather, the bike was flashed, ran fine for a period of time, now this problem presented itself. Why would someone conclude the tune is responsible without any further information?
Click to expand...

No I didn't do the flash. I recently bought the bike. Didn't notice the problem until I went to track. Not often you use full throttle and high rpm on this kind of bike :). See the dyno run image.
 
I saw the picture. When you say up-map, that’s a proprietary product from Termi. Is that the flash (up-map) that was done to the bike or do you not know what tune is on it?
 
bp_SFV4 said:
I saw the picture. When you say up-map, that’s a proprietary product from Termi. Is that the flash (up-map) that was done to the bike or do you not know what tune is on it?
Click to expand...

I guess it is the Ducati/Termi up-map, although stock can, but I don't know for sure.
Any other suggestion?
 
HenrikE said:
I guess it is the Ducati/Termi up-map, although stock can, but I don't know for sure.
Any other suggestion?
Click to expand...

I’m guessing previous owner had an exhaust put on it and took it off before selling the bike. Do you have the up map puck to reflags it back to stock?
 
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If you have a scan tool you can view and record the engines sensors, throttle input (twist grip) etc. to get a better idea of what the problem is. If you don't know what the flash is, that's a starting point. It it's a Ducati or Termi flash, I doubt very highly that it's the problem.
 
bp_SFV4 said:
I take it you didn't flash it then the problem started. Rather, the bike was flashed, ran fine for a period of time, now this problem presented itself. Why would someone conclude the tune is responsible without any further information?
Click to expand...

There is more than enough info to determine it’s the ECU/tune causing the problem. Take a peak at the ...... up dyno chart. When the torque demand vs actual deviates significantly, the ETC closes the throttle and the power falls off. The how it happened of the ...... up tune isn’t known, but the “tune” is ....... If you have some tuning knowledge it’s pretty obvious.
 
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You can't possibly know that with the information that's been posted in this thread. It's a guess. All you can say for certain is that something is causing a loss of power at 9K RPM.

Everyone of these threads is the same thing. Vague information and everyone shotguns guesses at the problem.

I could see if some nub with a laptop f'd up a tune, but I doubt a shop would see that dip on a dyno run and send the bike out since the customer would have likely saw the dyno results. I also very much doubt a good tune would all of a sudden dip like that at 9K.
 
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Haha appreciate all the input, man-guesses, experiences, hope or convictions :cool: . It has been to ducati workshop and they could not see anything wrong on their scan tool.
I will keep you posted after map change. I hope it is not the ECU.
 
Bad ECU is a guess which is thrown around a lot. Solid state electronics are not things which often fail.

I’m suspicious that all the dealer did was hook up to the bike to see if there were any pending or stored codes and not any meaningful diagnosis.
 
bp_SFV4 said:
Bad ECU is a guess which is thrown around a lot. Solid state electronics are not things which often fail.

I’m suspicious that all the dealer did was hook up to the bike to see if there were any pending or stored codes and not any meaningful diagnosis.
Click to expand...

Can only trust their word when they say they checked throttle reading, fuel pressure, swapped tank/fuelpump etc.
 
bp_SFV4 said:
Were they able to duplicate the problem?
Click to expand...

Not really. It is really difficult without a dyno. I myself have only managed to trigger it a couple of times on public roads. On track, every straights. Hence, I brought it to a shop with dyno access. Remember it is only on full throttle.
Oh... and it gets worse if I short shift. If I don't give full throttle it can rev up past 12k rpm.
 
Last edited:
I had my exhaust valve closing on me at high rpm under load . I wired it open but have now removed it and no issues since.
 
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