Fri May 27, 2016 9:00 am

Addicted
2015 BV350 2007 GTS(sold) 2003 BV200
Joined: 04 Feb 2012
Posts: 762
Location: nyc
 
Addicted
2015 BV350 2007 GTS(sold) 2003 BV200
Joined: 04 Feb 2012
Posts: 762
Location: nyc
Fri May 27, 2016 9:00 am linkquote
So I was looking for info/advise.
I have a 2015 BV350 with just about 5k. It stalls within 15 seconds of starting. Then unpredictable runs rough. I have dipped my gas tank to test for water. I have Chevron with techron the first tank it seemed to clear up. when I filled it up on the second tank half way through the trouble has come back. I checked the spark plug boot and the spark plug everything looks ok. I opened the air box shook out the filter wiped oily residue.

I'm ready to pull the ecu/throttle body out to clean and check the passages.

Any ideas or experience on this would be fantastic.

Thanks
John
Fri May 27, 2016 10:20 am

Hooked
2013 BV 350
Joined: 07 Apr 2013
Posts: 324
Location: Gainesville, FL
 
Hooked
2013 BV 350
Joined: 07 Apr 2013
Posts: 324
Location: Gainesville, FL
Fri May 27, 2016 10:20 am linkquote
I know other's have experienced this to various degrees. There is an engine mapping update that your Vespa dealer can apply to the ECU that should help with this.

Also, for some people, the evap canister can cause some issues. Try loosening your gas cap so that it's not completely seals and air can get in and see if it still runs rough. It normally should vent through the evap system, but the general consensus seems to be that it causes more problems than it fixes. The next time breaknwind helps me work on mine (probably at my 12,000 mile service in a couple of months) I'm going to ask him about removing mine because while I wasn't having issues before, I am starting to now. Kept having it die on me when cold if I didn't give it a little gas. It stopped once I unscrewed the gas cap, so I'm pretty sure it's the evap system causing it for me.
Fri May 27, 2016 11:00 am

Hooked
2001 ET4 150 Red, 2010 GTS 300 Volcano Black, 2013 BV 350 Silver/Black
Joined: 27 Mar 2010
Posts: 396
Location: Bergen County, NJ
 
Hooked
2001 ET4 150 Red, 2010 GTS 300 Volcano Black, 2013 BV 350 Silver/Black
Joined: 27 Mar 2010
Posts: 396
Location: Bergen County, NJ
Fri May 27, 2016 11:00 am linkquote
not a new problem...for me I believe it's the EVAP system, solution I employ is fill with gas carefully.

http://modernvespa.com/forum/topic141198?highlight=evap
Fri May 27, 2016 11:02 am

Hooked
Beverly 350 Sports Touring
Joined: 14 Dec 2013
Posts: 165
Location: Marlow, UK
 
Hooked
Beverly 350 Sports Touring
Joined: 14 Dec 2013
Posts: 165
Location: Marlow, UK
Fri May 27, 2016 11:02 am linkquote
I've heard of the Kill Switch causing trouble like this. The German forum http://www.beverlyforum.de members have reported that this causes stalling or failure to start.

It's worth giving it a blast with contact spray and wiggling it a bit.

A problem with the side-stand cut-off was also mentioned once. But the usual culprits are mostly the spark plug or especially a cracked cap

Alan
Fri May 27, 2016 1:03 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (1800)
Joined: 27 Dec 2013
Posts: 2629
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (1800)
Joined: 27 Dec 2013
Posts: 2629
Location: Orange Park Florida
Fri May 27, 2016 1:03 pm linkquote
These are all good standard reply's to your problem. I haven't swapped the plug cap on my 2015 bike yet. I just got to 625 miles, so this weekend I'm doing the service.
Another thing to try is check the spark plug for tightness. There has been one thread on this forum where that was the problem.
Start with the easy solutions first 8)
Fri May 27, 2016 1:08 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (1800)
Joined: 27 Dec 2013
Posts: 2629
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (1800)
Joined: 27 Dec 2013
Posts: 2629
Location: Orange Park Florida
Fri May 27, 2016 1:08 pm linkquote
waterboysh wrote:
I know other's have experienced this to various degrees. There is an engine mapping update that your Vespa dealer can apply to the ECU that should help with this.

Also, for some people, the evap canister can cause some issues. Try loosening your gas cap so that it's not completely seals and air can get in and see if it still runs rough. It normally should vent through the evap system, but the general consensus seems to be that it causes more problems than it fixes. The next time breaknwind helps me work on mine (probably at my 12,000 mile service in a couple of months) I'm going to ask him about removing mine because while I wasn't having issues before, I am starting to now. Kept having it die on me when cold if I didn't give it a little gas. It stopped once I unscrewed the gas cap, so I'm pretty sure it's the evap system causing it for me.
The more I work on my bikes, the easier it gets. See you in a couple of months
Mon May 30, 2016 7:24 am

Addicted
2015 BV350 2007 GTS(sold) 2003 BV200
Joined: 04 Feb 2012
Posts: 762
Location: nyc
 
Addicted
2015 BV350 2007 GTS(sold) 2003 BV200
Joined: 04 Feb 2012
Posts: 762
Location: nyc
Mon May 30, 2016 7:24 am linkquote
I pulled the spark plug boot I did not see any white residue, I also checked in the dark I did not see any arcing either. I pulled off the boot / hose from the air box to the throttle body. I stuck the straw in the bypass hole and sprayed Several times. I started the engine and sprayed while running ie. it still ran rough and stalled. I noticed yesterday some muffler popping on decel When hot. I notice the idle is dancing hi and low.


John
Mon May 30, 2016 9:09 am

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (1800)
Joined: 27 Dec 2013
Posts: 2629
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (1800)
Joined: 27 Dec 2013
Posts: 2629
Location: Orange Park Florida
Mon May 30, 2016 9:09 am linkquote
tvnacman wrote:
I pulled the spark plug boot I did not see any white residue, I also checked in the dark I did not see any arcing either. I pulled off the boot / hose from the air box to the throttle body. I stuck the straw in the bypass hole and sprayed Several times. I started the engine and sprayed while running ie. it still ran rough and stalled. I noticed yesterday some muffler popping on decel When hot. I notice the idle is dancing hi and low.


John
Did you check the spark plug for tightness? Being a 2015, it should have the latest mapping update. That doesn't mean it's not faulty. My 2014 started popping a lot before it started stalling at every idle. Hasn't had a problem since they hooked it up to the laptop and charged me $100.
Mon May 30, 2016 11:18 am

Addicted
2015 BV350 2007 GTS(sold) 2003 BV200
Joined: 04 Feb 2012
Posts: 762
Location: nyc
 
Addicted
2015 BV350 2007 GTS(sold) 2003 BV200
Joined: 04 Feb 2012
Posts: 762
Location: nyc
Mon May 30, 2016 11:18 am linkquote
I had the spark plug out to check it felt normal coming out and back in.

John
Tue May 31, 2016 12:23 pm

Hooked
2013 BV 350
Joined: 07 Apr 2013
Posts: 324
Location: Gainesville, FL
 
Hooked
2013 BV 350
Joined: 07 Apr 2013
Posts: 324
Location: Gainesville, FL
Tue May 31, 2016 12:23 pm linkquote
tvnacman wrote:
I noticed yesterday some muffler popping on decel When hot.
That's normal. It happens on mine and I've seen it mentioned on here by others as well. I notice it most when I've been riding 15+ minutes at 60+ mph and just let go of the throttle completely to engine brake.
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