Hot temp starting problems - V2

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pdallan

pdallan

Joined
Jul 15, 2020
Messages
5
Location
Barcelona
I know this has been discussed for 1199 and other bikes - but it´s a problem now on my new V2. Cold starts - perfect. Hot start after 5 min - OK. Hot start after 30 minutes - 40 minutes...no. This is a problem with track days as the 40 minute break between tandas results in a long effort to start. Have tried no throttle, a blip, key on-off-on before start...nothing. Bike went to dealer and all Bologna could do was have them reset the engine mapping. Got it home - went for a ride - and 30 minutes later same no start. Trurns over and over and concerned battery will eventually go.

Anyone else ran into this? I suspect the fuel line getting hot and vapor lock. Turning over eventually will get things moving, but not always...missed my last tanda at Montmelo due to this a few weeks back and really need a better solution. My other Ducatis have all started perfectly hot or cold.
 
If it’s vapor lock, then open up the gas cap...if it suddenly equalizes the pressure and it starts then yes it’s the vapor recovery system is focked. Do you notice it happens worse when the tank gets lower on gas? Get that thing yanked out of it or get it checked. Could be the charcoal canister is bad or the check valve is bad, or the lines have become pinched when the tank was put on.
 
I tried opening the tank when it initially happened - no help. It turns over and over and eventually seems to get some fuel moving. I also tried burping by key-on-off. No help. I tried something different last night and opened the throttle full on and it started - ran rough - but started. Will test again today. Run up to temp - turn off 30 minutes and start with throttle. Maybe a temperature sensor off? I would have assumed the Ducati Service / back-forth to factory would have done more to diagnose and correct this on a new bike. Once running though - especially on circuit - perfect.
 
Tested again tonight - ran to 103C then off. 30 min later (83C) and would not start. Tried no throttle then full throttle. No luck. Eventually started to catch after 20 seconds or more of starter and multiple attempts.
 
Hey @pdallan I ran into a similar problem almost a week back. Luckily I got the issue on video here. The bike was hot and was standing under direct sun for 15 minutes when I had this issue. (had it 2 times the same day)
I took the bike back to the Ducati Service and presented them the video as a proof. The service guys shared the issue with Ducati and they came back saying the issue might be because the bike was on low fuel so it might be picking up vapors. They did not find anything wrong in the diagnostics.
But how much is low fuel? I rode almost 20 miles after the video was taken. I filled up the tank after 20 miles but I should be ok for at least 25-30 miles.
And now Ducati is not taking this warranty. If you are having this issue without being on low fuel, then this issue must be raised to them.
I not very happy with the customer experience. Keep us posted
 
On a car, I would take fuel pressure measurements. Pinch the purge line shut on the vapor canister and see if the symptoms change.
 
Did you possibly overfill the tank and get too much in the charcoal canister? If it gets saturated with fuel that can cause issues. In the old days you had a tube for gas overflow and it just got dumped out.
 
.....but some fools park their bike in the living room.

imho, the purge system is just a controlled vacuum leak. engaging emissions on start up is quite foolish. thanks Brussels.

the valve should be shut until the coolant is up to temperature and the manifold vacuum is above a threshold. i am not against catching the fuel vapors and burning them off on the overrun but mixing them into the system continuously is as smart as direct injection. they mean well but fail in the execution.

fuel can expand quite a bit with temperature and vapor pressure can be astronomically high with vigorous shaking. throw a cup of gas in a jug and shake it up and it will make crazy pressure. i pop the fuel cap after i shut the bike off every time.
 
Fuel tank full, but not overfilled. I have not seen this reported on many 959's and the only difference is the new EU spec / engine tweaks for the extra 5hp...so maybe something there. Starting to suspect the charcoal canister. I've contacted Bologna directly as well as local shop. The local shop is usually really good, but not this time.
 
I had some weird issues initially with my bike dying at lights and it was also displaying low fuel light. Eventually it fixed itself? Hasnt happened again.

Thats definately not good ducati themselves aren't taking the warranty claim. I would follow up with them a few times to make 100% sure they arent going to fix or check it. Then I would go down to your local consumer law agencies.

I work for state agency here that deals with several departments. If your state is like mine. We don't not like buisnesses taking advantage of consumers.

Sent from my SM-G988U using Tapatalk
 
If this was an MV Agusta F3 I would say “sprag clutch” as these are the exact same symptoms the F3 model showed.
 
Bike back from the taller...they replaced the 'carbon canister'. I rode home (engine temp when turned off was 103), opened and closed gas tank to 'relieve pressure' as per mechanico, and waited. 30 min later (temp 82) - no start. I waited another hour (engine temp 52) and immediate start. Hard to believe that this is the only V2 out there with this issue or use-case. Not good for hot climate and track days as 40 min off and no start = missed tandas. Back to dealer again on Monday...
 
pdallan said:
Bike back from the taller...they replaced the 'carbon canister'. I rode home (engine temp when turned off was 103), opened and closed gas tank to 'relieve pressure' as per mechanico, and waited. 30 min later (temp 82) - no start. I waited another hour (engine temp 52) and immediate start. Hard to believe that this is the only V2 out there with this issue or use-case. Not good for hot climate and track days as 40 min off and no start = missed tandas. Back to dealer again on Monday...
Click to expand...
I’ve been having the same issue and it started right after the first service. I’m convinced they screwed something up. It’s going back in 10/26 to get looked at.
 
I’d check all the connectors and the coils. When heat goes up so does resistance, and they may not have properly connected things back up.
 
I encountered a similar problem with you. The cold car almost cannot start normally, and it is very difficult to start.

Every time I start, I must follow these steps, turn on the key, wait for the end of the self-test, turn the start switch, then turn off the key, wait 10-20 seconds, turn on the key again, and start the vehicle. All this is like a routine operation, full of ritual sense.

My dealer did a lot of inspections and tests for me, but still did not solve the problem. If the car is kept in the parking lot, it will be normal every time it starts.


I want to ask you, have the problems you encountered have been solved? Where is the problem?

This hyperlink is the phenomenon of my car I recorded:
youtube.com

starting problems - ducati panigale V2

youtube.com youtube.com
 
For me the bike would only ignition cycle on first cold start. When I'd cycle it a 2nd time it fired right away. Seemed to be a primer issue maybe

Sent from my SM-F916U using Tapatalk
 
I had my first hot start issue today after pulling into my driveway after about a 140 mile ride through the mountains under warm temperatures. I shut the bike off while I retrieved my garage opener from behind the solo seat pad and when I returned the key to the ignition, the bike refused to start. After 2 or 3 tries I let it set a few seconds and tried again and it started right up. Hmmm...
 

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