dado099
Full Cat A
 Offline
Posts: 51
|
 |
« on: August 03, 2018, 16:24:11 » |
|
Hi,
just having this new issue:
When starting at the morning (engine totally cold) it starts, but idle is not stable and after about 30 seconds engine always stop. Then after restarting everything is fine.
Starting from hot no issue.
I had the injector cleaned in ultrasonic bath because engine totally died two months ago.
Any guess ?
Is injector clogging again ?
Thanks in advance.
|
|
|
|
|
Logged
|
|
|
|
|
spannerman
|
|
« Reply #1 on: August 03, 2018, 18:22:39 » |
|
My Beverly 350 had a green coloured suppressor cap which needed upgrading, very difficult to remove without cracking it. Have a look at it, it is hard to put back on the plug top properly. It could be not a good fit and under the cold start it does not make good contact because of the increased vibration.
|
|
|
|
|
Logged
|
Dave Weller, Chatham VespaGTS250, Royal Enfield 350 HNTR. NC750X
|
|
|
Dave Milnes
Administrator
Old Timer
Offline
Posts: 21333
Millom Cumbria
|
|
« Reply #2 on: August 03, 2018, 19:20:31 » |
|
You shouldn't have dirt in the fuel these days and it doesn't deteriorate like it used to. Not in the UK so not even in Italy!
Sound more electrical to stall always after a pre-set time interval. Something thermal so check out that plug cap.
|
|
|
|
|
Logged
|
2021 Honda NSS750 Forza
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Lake District 2024, Durham 2025
|
|
|
|
Mottza
|
|
« Reply #3 on: August 03, 2018, 21:52:07 » |
|
Lambda sensor maybe
|
|
|
|
|
Logged
|
2023 Honda ADV350 & 2020 Honda Super Cub C125 - Previous: 2016 Honda NC750S, 2013 Honda Silverwing 600, 2014 Honda Forza 300, 2003 X9 250SL, 2002 Aprilia Leonardo 250, 2004 Piaggio B125 and 2005 Peugeot Ludix 50
BikeSafe
France 2009 & 2018, Betws-y-Coed 2013, Yorkshire Dales 2014, Forest of Dean 2015, West Country 2016/2017, Norfolk 2017, Peak District 2018, Telford 2019, Cornwall 2019/2024/2025, Lincoln 2021 & Scotland 2023! 12 years of Pie and Mash Rides!
|
|
|
|
The Bern
|
|
« Reply #4 on: August 03, 2018, 22:04:31 » |
|
Suppresor cap (if it has a resistor in it)
|
|
|
|
|
Logged
|
Virago 535
Innova 125
Telford & beyond
|
|
|
|
roadster
|
|
« Reply #5 on: August 04, 2018, 08:30:15 » |
|
My first guess would be an accumulation of deposits in the inlet tract in the region of the extra air valve ( idle control valve) and butterfly. Might be worth taking it off and cleaning with carb cleaner spray. This is fairly common when breathers are routed back into the inlet and you might also have an air filter which is excessively oily. The idle system ( hot or cold ) is a closed loop feedback system which should always maintain the idling at a set rpm. If it can't do that the air control valve is the thing most likely to be sticking a bit. Having said that if the injector has played up before you can't rule it out.
|
|
|
|
|
Logged
|
|
|
|
Mike H
Rider for the Ride
Stunt Rider
Offline
Posts: 2319
Moto Guzzi V7 850 and Velorex sidecar
|
|
« Reply #6 on: August 04, 2018, 09:01:02 » |
|
My white one has the later improved HT lead and cap, however as above still difficult to make sure it's clicked on plug properly, I didn't one service after that it could misfire and do odd things. To be fair tho it managed an 850 miles tour like that.
|
|
|
|
|
Logged
|
Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.
|
|
|
dado099
Full Cat A
Offline
Posts: 51
|
|
« Reply #7 on: August 05, 2018, 16:17:59 » |
|
Hi guys,
thank you very much for the contributes, you are wonderful.
As many suspected suppressor cap, so first try:
new suppresor cap with new cable set and new spark plug:
same behaviour.
2nd: butterfly dismounted and full cleaned:
same behaviour.
Now I suspect two things: partially clogged injector or contaminated fuel.
Next try is to almost empty the tank and make a new fill from another pump than usual.
If this will not cure, I'm going to replace injector because I found it on ebay for only 30 euros.
I will keep you updated.
Thanks again
|
|
|
|
|
Logged
|
|
|
|
dado099
Full Cat A
Offline
Posts: 51
|
|
« Reply #8 on: August 06, 2018, 15:46:28 » |
|
Mmmmh,
Thinking I'm getting near.
I noticed a rubber bad condition joint from butterfly to head.
If i get moving it at idle, it becomes unstable.
Just ordered a new coupling and let's see.
|
|
|
|
|
Logged
|
|
|
|
Dave Milnes
Administrator
Old Timer
Offline
Posts: 21333
Millom Cumbria
|
|
« Reply #9 on: August 07, 2018, 06:39:31 » |
|
A split inlet manifold? This used to be a problem on 125 and 250's with carbs when the hard rubber manifold perished and cracked. Never known of it since Fi became the norm. Well spotted.
|
|
|
|
|
Logged
|
2021 Honda NSS750 Forza
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Lake District 2024, Durham 2025
|
|
|
|
|
dado099
Full Cat A
Offline
Posts: 51
|
|
« Reply #11 on: August 07, 2018, 18:23:31 » |
|
BINGO !  |
|
|
|
|
Logged
|
|
|
|
Mike H
Rider for the Ride
Stunt Rider
Offline
Posts: 2319
Moto Guzzi V7 850 and Velorex sidecar
|
|
« Reply #12 on: August 08, 2018, 21:28:33 » |
|
Luv it when a plan comes together.  |
|
|
|
|
Logged
|
Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.
|
|
|
|
