Latest ECU update Snatchy Engine - Ducati Supersport 939 Forum
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post #1 of 16 (permalink) Old 06-18-2019, 03:40 PM Thread Starter
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Latest ECU update Snatchy Engine

Hello Everyone!

I recently took the bike in for some warranty work and now that I have it back the bike is really snatchy on the throttle. If I keep the bike in neutral and try to hold the RPM at a constant rpm between say 2000 - 4000 rpm it either spikes or just falls off. I can't hold a constant RPM.

This seems to be accounting for bad snatchyness when riding. Especially in 1st and 2nd gear between 2500 - 5000 rpm. It's like I'm jerking the whole time and trying to keep the bike smooth is almost impossible.

Anyone else experiencing this?
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post #2 of 16 (permalink) Old 06-18-2019, 03:45 PM
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Originally Posted by HeartofDavid View Post
Hello Everyone!

I recently took the bike in for some warranty work and now that I have it back the bike is really snatchy on the throttle. If I keep the bike in neutral and try to hold the RPM at a constant rpm between say 2000 - 4000 rpm it either spikes or just falls off. I can't hold a constant RPM.

This seems to be accounting for bad snatchyness when riding. Especially in 1st and 2nd gear between 2500 - 5000 rpm. It's like I'm jerking the whole time and trying to keep the bike smooth is almost impossible.

Anyone else experiencing this?
Is this after the dealer visit and ecu update?
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post #3 of 16 (permalink) Old 06-18-2019, 03:49 PM Thread Starter
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Well, yeah. It has always been a bit like that but really noticable now. Even in 5th and 6th now I notice it. I have fallen out of love with this bike. Well.. and my check engine light was one when I took it in and it was the exhaust valve switch thing. Have had it back a month and it's on again...

Warranty ran out last week.. This bike has been in the shop more than any bike I've ever owned and all my other bikes were used and older. Kind of sucks.
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post #4 of 16 (permalink) Old 06-18-2019, 04:37 PM
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I don't have that issue. I'd take it back and get it resolved. Hopefully you've documented this when it was still in warranty. I would start with the sensors and controls.

Several have noticed a little throttle lag when cold and have suspected that a recent ECU update was the culprit but nothing like his. It could be the ECU update might have worsened an underlying problem. Why would the service shop deliver a bike that can't keep constant engine speed? That's unacceptable. I'd have a heart to heart with the manager of the place. If he can't fix it, Ducati needs to find someone else.

Which makes me wonder if there are any Ducati boards that have experienced service mechanics with knowledge. I know that Moto Guzzi owners have to share knowledge on tech boards to keep their bikes running whereas here there isn't a depth of knowledge for late model Ducs. Perhaps we should combine all the various models under a single Testastretta board?

John L

Last edited by LowRyter; 06-18-2019 at 04:43 PM.
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post #5 of 16 (permalink) Old 06-18-2019, 05:52 PM
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“Which makes me wonder if there are any Ducati boards that have experienced service mechanics with knowledge.”

We have at least one Member confirmed to be a Ducati Technician who works on SSs, but he hasn’t been active since Dec 2018.

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post #6 of 16 (permalink) Old 06-18-2019, 06:33 PM
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Quote:
Originally Posted by HeartofDavid View Post
... and my check engine light was one when I took it in and it was the exhaust valve switch thing. Have had it back a month and it's on again...
I had a similar issue.

The first time hey cleaned and lubed, second time they replaced. Probably something similar in your case. Being out of warranty shouldn't be an issue as they failed to address it properly. Don't know about where you are, but in Oz workmanship should be of an expected standard.
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post #7 of 16 (permalink) Old 06-20-2019, 06:28 PM
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My Supersport has the smoothest fueling of any bike I've owned except my FZ1 (which had a carburetor). One of the best things about it. I expect it will get even better after uploading the Termignoni fuel map.

Sorry you're having an issue. It's definitely not normal and something the dealer should address.
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post #8 of 16 (permalink) Old 06-20-2019, 09:42 PM
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Is there a Term fuel map and if so, what does it take to adapt/install it?
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post #9 of 16 (permalink) Old 06-20-2019, 09:46 PM
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https://www.up-map.it/en/t800/

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post #10 of 16 (permalink) Old 06-20-2019, 09:47 PM
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https://www.ducatisupersport939.net/...ermignoni.html

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