01-19-2017, 05:34 PM | #106 | |
Join Date: Jan 2015
Location: England
Posts: 382
|
Quote:
In open loop it uses all the other sensors to reference against the map tables in order to try and maintain a 14.6:1 air/ fuel ratio when idling, gentle acceleration or cruising. Without the O2 sensor in use it has no way of checking that this has been achieved. Once the engine temp is around 25 degs C and the O2 sensor is up to temp your bike enters in to closed loop. In closed loop the O2 sensor is been used as well. Now the bike can monitor the emissions and now knows if the air fuel ratio is correct and will make small adjustments many times a second to maintain 14.6:1 A/F . Your bike will only remain in "true" closed loop when idling, gentle acceleration and cruising. At any other time a different fuel/air ratio is required. There are a number of "overrides" that can come in to play when this occurs to give a richer or leaner mixture. I didn't know that a lean mixture gives high HC's , that doesn't make sense to me but I have no knowledge about this here is a graph of my RX3 showing a zero injector pulse when the throttle position hits zero And the next graph is of my engine temp before I changed the thermostat. the temp only peeks at the end because I came to a stop and let it idle. (temp in degs C ) |
|
|
01-19-2017, 05:44 PM | #107 | |
Join Date: Jan 2015
Location: England
Posts: 382
|
Quote:
Think Its worth pointing out that the RX3 in the USA were a later edition to the RX3 in the UK and had an updated ECU fitted , perhaps this is why the UK bikes might suffer a bit more from this problem. I agree, 99% of the time the fuelling from the engine management system on these bikes work perfectly |
|
|
01-20-2017, 09:18 AM | #108 | |
Join Date: Dec 2016
Location: Western PA
Posts: 363
|
Quote:
Your injector pulse floor is showing zero, is that a demand? (the bike idles at one point for about five seconds by the look of it) I'm guessing there is a standard idle pulse at this point or the engine would cut. |
|
|
01-20-2017, 12:59 PM | #109 | |
Join Date: Jan 2015
Location: England
Posts: 382
|
Quote:
Not quite sure what you mean by "demand" , I've added a new pic below , with RPM, to try and put it in to context. This log I did some time a go , with my laptop in the top box So at marker 1, I probably came up behind a car but because of on coming traffic I could not over take, shut the throttle for engine braking. at this point the injector pulse drops to zero but the RPM is still about 5500. Marker 2 Probably I blipped the throttle whilst changing to a lower gear. (note a blip of fuel injected) Marker 3 Opened the throttle up, probably clear to over take. Injector pulse returns |
|
|
01-22-2017, 05:20 PM | #110 | |
Join Date: Dec 2016
Location: Western PA
Posts: 363
|
As if on cue for me mentioning it not just being an RX3 thing, here's another Ninja 300 stalling story at my other motorbike online home:
http://www.kawasakininja300.com/foru...ting-stop.html And a quote from another thread on the issue, which recommends exactly what @2LZ suggests: Quote:
|
|
|
01-23-2017, 03:00 AM | #111 |
Join Date: Sep 2016
Location: Redmond, WA.
Posts: 534
|
Yesterday and today I started having the engine die when I pulled in the clutch and just like the last time I checked the valves and the intakes were fine but the exhausts were tight again. Adjusted and now it's running fine. Had to do this adjustment without waiting the 34 hours to cool since I have to leave in the early am to make it to the Mojave Desert with my group.
__________________
2017 BMW F800GS Adventure |
|
01-23-2017, 08:54 AM | #112 |
Join Date: May 2015
Location: Wimberley Texas
Posts: 193
|
I would not think that waiting 24 hours to adjust valves is necessary....maybe 5-6 hours.
Would like to hear more about your Mojave desert ride (Joshua Tree NP) ? As I will be visiting there prior to my Baja ride. |
|
01-23-2017, 02:35 PM | #114 |
Join Date: Apr 2008
Location: Somerset, KY
Posts: 687
|
Pretty sure my issue is a fueling related issue.....I wonder how easy it'd be to swap in a Carb and see how it ran....
I will check my valves again, but I've already checked them once since it started...and mine doesn't die when I let off the throttle, it drops down to, and idles fine, for 10-45 seconds, then it'll out of no where die.....always starts back up, but it is annoying
__________________
Huck 2013 Honda NC700X 2013 Moto Guzzi V7 Stone 2016 AJP PR4 2022 Templar X 250 2021 Sondors Metacycle AMA Life Member |
|
01-27-2017, 12:59 PM | #116 |
Join Date: Apr 2016
Location: South Mississippi
Posts: 253
|
Cant wait to hear all about it...and pics of course, Martin!
|
|
01-30-2017, 03:07 PM | #117 |
Join Date: Feb 2016
Location: Maryland
Posts: 213
|
Martin that's great news. I hope it continues. Once the weather breaks here in NY, I'll keep you posted to see if ours dies again.
|
|
02-21-2017, 02:46 PM | #118 |
Join Date: Sep 2008
Location: central PA
Posts: 770
|
mine does it to Dave ,,more than it should , an more when its hot ,,,tried everything,, still does it even tho the valves where adjusted by csc,,I think there is a problem at the ignition switch,,,,since that is the only place either I or csc has checked.
__________________
2015 zongshen rx3,,(Sold),,,2016 bashan storm,,2005 Harley ultra classic. |
|
02-21-2017, 04:50 PM | #119 | |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
|
Quote:
"The used to be another RX3 web group I followed, I think a guy named Andy (cat herder?) posted that he started having stalling problems and found the ignition switch assembly had some dust inside. Seems the dust fluffered the contactulators and wouldn't let the pixies go to the wires they wanted to dance in. I seem to recall he used a couple shots of electrical contact cleaner/lube. I think he also covered the holes in the switch body. He never reported another repeat of the stalling up until the web site vanished."
__________________
"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
|
|
02-21-2017, 05:34 PM | #120 |
Join Date: Dec 2015
Location: CO
Posts: 1,525
|
I read on the CSC Blog, they like to use "Lucas Fuel Treatment and Upper Cylinder Lube" to help with this issue... might be worth a try for everyone having those problems (did I say this already somewhere?? )
Lucas Fuel Treatment will (over time) clean things up, but where it shines is it's lubricating and 'Fuel Tension' properties... it contains a chemical known as " PIB " (Polyisobutylene)... PIB basically helps in 'controlling/evening out fuel molecule/droplet sizes to help in a more complete combustion cycle', when being sprayed out a fuel injector or after it hits the emulsion tube on the carby... all the fuel droplets want to be a similar size ready to go bang... might be really important when cutting the fuel down to idle on these fuel injected motors ?? Good thing is that, this version of Lucas Fuel Treatment, can (usually) be bought by the gallon for about $22 + taxes after an online coupon at your local Advance Auto Parts... only need to use 1 to 1.5 ounces of Lucas Fuel Treatment for every 5 gallons of fuel, so a little bit of the stuff goes a long way Only one bad thing, and I said it earlier... it will clean things like carbon, varnish, gum, and other buildup seen in the fuel/combustion process (fuel gauges have been helped too in some cases)... but it takes several tanks and a few thousand miles to actually see the cleaning happen... "Just stick with it" was what I would tell customers on a budget, not wanting to spend $140 for the "4 stage fuel system/top end cleaning" we would perform at the stealerships... This Lucas Fuel Treatment is still a good product for the price point, has great lubing and combustion helping properties / but has a much slower "cleaning process" compared to other fuel treatments out there
__________________
"Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P. |
|
|
|
|
|