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+--- Thread: O2 sensor eliminator — why? (/showthread.php?tid=5743)
RE: O2 sensor eliminator — why? - Guth_imp - 06-16-2015
(06-16-2015, 12:53 AM)mininsx_imp Wrote:(06-15-2015, 11:02 AM)Guth_imp Wrote: It turns out that I've been doing a bit of lurking here on the forum. Reading with interest the posts of others who have installed an O2 sensor eliminator. The reason for this? My CB1100 had been exhibiting fairly poor fueling characteristics at levels below approximately 3000 RPM. Each ride would end the same way: with me cruising down the street all herky jerky 'til I pulled into the driveway and shut it down. Now to be fair, while this feels like a big deal to me when I'm on the bike, I have no idea whether or not someone watching me pass by would notice this at all (or whether or not they could hear the throttle hunting in my exhaust for that matter).
At any rate, I recently went ahead and ordered an O2 sensor eliminator. Got it installed in just a few minutes. Took the bike for a quick spin around the neighborhood, just putting along nice and slow. It was like night and day. The fueling was incredibly smooth. Next I'll need to get the bike nice and warmed up and see if that makes a difference. I'm hoping that the fueling will remain smooth and steady. That's all I'm really interested in. I'm not concerned about performance gains. I'm hoping that I don't see a decrease in gas mileage.
But my question is this: why the need for this small contraption? It would seem that most here are happy with the fueling on their CBs, some reporting that it's close to perfect. Some report otherwise, a few of which have turned to solutions like the eliminator unit. Could this indicate that some of us have had O2 sensors go bad (or seriously fouled)? I'd be curious to see how my bike would respone to a replacement sensor. However that would be a far more involved not to mention a much more expensive test than just installing an eliminator plug. I guess you could say that my curiosity has only been partially satisfied.
What think ye knowledgeable forum members?
I've got the same problem you have, the low RPM performance is all herky-jerky and definitely not smooth. It reminds me of how my old '74 VW ran with ethanol in the gasoline. Keep us posted on your results because I'm interested if this might be a solution to our problem. Oh, and how about a link to the one you bought?
The commute to and from work today was much more enjoyable as a result of having installed the O2 eliminator.
As far as which one I went with: I bought one of the units, from Redline Superbikes. It is the kit that included the parts for removing the O2 sensor from the exhaust.
RE: O2 sensor eliminator — why? - metalmaven_imp - 06-16-2015
Thanks for the post Guth, I have noticed the same jerky throttle at low rpms in 1st and 2nd gear also. Always bothered me but I thought it just was what it was. I am going to try this.
RE: O2 sensor eliminator — why? - mininsx_imp - 06-17-2015
(06-16-2015, 02:46 AM)Gumby 1100_imp Wrote: Mininsx,
Did you try the TPS reset procedure first? It seems to work for me and many others to smooth out low speed throttle response.
In case the procedure stops working for me, I purchased a Sensor Eliminator from Redline Superbikes in England:
[url=http://www.ebay.ca/itm/o2-Oxygen-Lambda-Sensor-Eliminator-For-HONDA-CB-1100-2013-2014-/321554121939?pt=LH_DefaultDomain_3&hash=item4ade1e84d3&vxp=mtr]http://www.ebay.ca/itm/o2-Oxygen-Lambda-...d3&vxp=mtr
Or this model which includes a screw and washer to replace the Lambda Sensor in the exhaust:
[url=http://www.ebay.ca/itm/o2-Oxygen-Lambda-Sensor-Eliminator-Set-Blanking-Plug-HONDA-CB-1100-2013-2014-/221639679815?pt=LH_DefaultDomain_3&hash=item339ac11f47&vxp=mtr]http://www.ebay.ca/itm/o2-Oxygen-Lambda-...47&vxp=mtr
Yeah, I've done that several times and it smooths out some but not completely. I've learned to live with it but if I can eliminate it that would be great.
RE: O2 sensor eliminator — why? - CIP57_imp - 06-17-2015
I though about eliminating the O2 when i added the aftermarket exhaust but saw no positives only negatives. Running without it gives you a straight line A/F ratio (similar to a bike with carbs) , not able to compensate for elevation changes, cold, hot, low/high humidity. Piggyback controllers even have the ability to add there O2 as an add on.
But hey, if the bike runs better go for it
RE: O2 sensor eliminator — why? - ChipBeck_imp - 06-17-2015
Gentlemen,
This is strange. Guth and I have the exact same bike, same model year, same exhaust. But my engine is as smooth as silk at all RPM's. It runs so nicely that I don't want to put my K&N filter on or make other minor changes that might screw it up. It almost has to be a fouled O2 sensor as the only other possibility is a most unlikely computer fault. Bill have you ever run leaded fuel in your bike? One other possibility is a frayed or shorted out wire coming from that sensor. I know you ride in the rain pretty often and perhaps water has corroded or shorted something out. If that O2 sensor eliminator has everything running fine then it is a moot point. I'm curious to know if your bike will still run as well at high altitude or will it run rich. The next time you ride up that big mountain in your area please report in. Cheers.
Chip
RE: O2 sensor eliminator — why? - Toro5xi_imp - 06-19-2015
I also would recommend checking the TPS sensor position as someone else suggested. It is a 3 wire potentionometer which has a 5 volt reference signal provided by the ECU. It's function is to let the ECU know what type of load the engine is under along with the MAP sensor. Under conditions of light load and high manifold vacuum ignition timing is advanced as the flame front travels slower. On both my bandit 1200 and Bonneville the TPS was out of adjustment. Not sure on the CB but on those bikes just losen 2 screws and rotate the TPS. Made a nice improvement in off idle response.
O2 sensors today seldom go bad. It is a long shot but an exhaust leak can cause what is called a false lean reading. As the exhaust pulses pass the exhaust leak the resulting low pressure zone will pull in fresh air. The O2 sensor will see this and send a low voltage signal to the ECU. To check hook up a multimeter to the O2 sensor and use propane to see if the voltage signal consistently stays above or below .5 volts. This is the shade tree method but I never could justify the 5 grand for a 5 gas analyzer. You want to use the pre cat O2 sensor for this.
Good luck. Drivability issues can be maddening but it is fascinating I think to try and figure out the issue and very satisfying when fixed.
RE: O2 sensor eliminator — why? - the Ferret - 06-19-2015
HUH ???????? Holy cow that was like reading a Kevin Cameron article. Lol
RE: O2 sensor eliminator — why? - Toro5xi_imp - 06-20-2015
The electronics make sense once you understand what they are trying to accomplish. I am just a bean counter accountant but went to tech school at night to learn more about this stuff. The hard part I think is having access to the information and tools such as a scan tool and gas analyzer. The guys over on the Triumph rat forum really dig into it. Glad to say my CB has been flawless. Hit the starter and go. Love this bike.
O2 sensor eliminator — why? - Guth_imp - 06-20-2015
I'll eventually make my way to my favorite local independent shop to get things checked out with tools that I don't have. Like others, I don't exactly find the O2 sensor eliminator to be a desirable long term solution for reasons already mentioned above.
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RE: O2 sensor eliminator — why? - Toro5xi_imp - 06-20-2015
Good luck Guth. Bummer when the Bike is not running like you want. Did the issue show up under warranty? Just curious if the dealership had any suggestions.