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Old 10-18-2012, 09:09 PM   #41
CrossRoads
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Default Learning from someone else's goof

So, in the hopes that this solves someone else a potential panic attack, I will go ahead and share how to disconnect the O sensors if you have the Cobra FI2000 PowrPro. Not because it's a difficult task, but since I fell for the opportunity to do it wrong, I figured someone else will find this helpful.

I disconnected the O sensors, and started up the bike. Within about 5 seconds at idle, check engine light came on. I reconnected the O sensors, restarted again, and all was good. So that told me that something I had done was not right. But what could it have been? All I did was disconnect the two sensors, which I had done before, prior to the fuel controller.

It then dawn on me that I had disconnected them the wrong way. Yes, there is such thing as a wrong way. I had disconnected the wire that comes from the sensor itself and plugs into the Cobra connector. This left the fuel controller talking to the ECU, but without the input from the O sensor. This is what causes the check engine light to come on and throw the lean codes, because the fuel controller tells something to the ECU that makes the ECU go into panic mode.

I have left the O sensor plugged into the Cobra PowrPro, and unplugged the connector between the fuel controller and the O sensor that goes to the ECU. No error codes, all is good.

So, if there is only one thing you'll remember off this post, remember this: Do not disconnect O sensor from the fuel controller, leaving the fuel controller connected to the ECU.
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Old 10-19-2012, 06:45 AM   #42
basshawk84
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I've got all of the O2 connections unplugged, both from the sensor and from the Cobra.
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Old 10-22-2012, 07:22 PM   #43
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Did 500 miles this weekend . O2's disconnected and no error codes. My bike ran strong and pulled very hard. Cobra is set for around 8 to 9 o'clock and my fuel mileage was around 47 to 49 mpg. Except for occasional burbling on decel with minor pops it ran great. LLoyds IAV should fix that but it doesnt really bother me.
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Old 11-08-2012, 04:20 PM   #44
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Quote:
Originally Posted by CrossRoads View Post
So, in the hopes that this solves someone else a potential panic attack, I will go ahead and share how to disconnect the O sensors if you have the Cobra FI2000 PowrPro. Not because it's a difficult task, but since I fell for the opportunity to do it wrong, I figured someone else will find this helpful.

I disconnected the O sensors, and started up the bike. Within about 5 seconds at idle, check engine light came on. I reconnected the O sensors, restarted again, and all was good. So that told me that something I had done was not right. But what could it have been? All I did was disconnect the two sensors, which I had done before, prior to the fuel controller.

It then dawn on me that I had disconnected them the wrong way. Yes, there is such thing as a wrong way. I had disconnected the wire that comes from the sensor itself and plugs into the Cobra connector. This left the fuel controller talking to the ECU, but without the input from the O sensor. This is what causes the check engine light to come on and throw the lean codes, because the fuel controller tells something to the ECU that makes the ECU go into panic mode.

I have left the O sensor plugged into the Cobra PowrPro, and unplugged the connector between the fuel controller and the O sensor that goes to the ECU. No error codes, all is good.

So, if there is only one thing you'll remember off this post, remember this: Do not disconnect O sensor from the fuel controller, leaving the fuel controller connected to the ECU.
It's a nice cool 65 in sunny south Florida. Went to start my bike and it has an eratic idle. Course I just started it and let it run for about 2 mins before I revved up to about 3500 rpm but it just didnt sound right. My Cobra unit is still installed with no O2's connected.

Last couple of rides I found her stalling at lights a few times and that got me concerned. I decided after reviewing many threads on 02 sensor disconnects that I would try to just connect the factory O2 connections and leave the Cobra O2's out of the picture. (which I had been doing all along since I installed this second tuner). Started the bike and it went to a perfect idle and seems to be back to normal. I'm starting to think that the ECU needs these O2's connected in order to run this bike properly. I just hope leaving the Tuner plugged in and the factory O2's only connected will be o.k.

Any of you fellas having the same issues?
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Old 11-08-2012, 04:58 PM   #45
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I'm still running with all the O2 connections disconnected, both from the Cobra and the ECU. No issues since I disconnected them.
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Old 11-08-2012, 05:11 PM   #46
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Originally Posted by basshawk84 View Post
I'm still running with all the O2 connections disconnected, both from the Cobra and the ECU. No issues since I disconnected them.
Just got off the phone with Phil. He says I should be fine with the factory O2's connected. I'll try it this way and see what happens.
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Old 11-08-2012, 05:16 PM   #47
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I tried it that way and still got error codes which is why I have everything disconnected now. BTW, I've now got the Cobra set at the factory setting of 7. My gas mileage is back around where it was. If I keep it under 65 mph, I'm getting low to mid 40's mpg. On the interstate at 70-75, it's around 38-40 mpg.
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Old 11-12-2012, 08:16 PM   #48
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Originally Posted by basshawk84 View Post
I tried it that way and still got error codes which is why I have everything disconnected now. BTW, I've now got the Cobra set at the factory setting of 7. My gas mileage is back around where it was. If I keep it under 65 mph, I'm getting low to mid 40's mpg. On the interstate at 70-75, it's around 38-40 mpg.
Man I hope that doesnt happen to me again. I'm out of options! Right now my bike is running much better after O2's (Factory only)connected. I got better slow speed response at the throttle. No stalling. Popping while shifting is way reduced. Decel popping gone. Acceleration feels stronger and cleaner no doubt due to the leaner mixture after re connecting the stock O2's. I rode all day sunday with no problems and a smooth resposive bike. Hope this works.
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Old 04-19-2014, 02:15 PM   #49
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Originally Posted by basshawk84 View Post
Slickvic. it's not a connection problem. My wife and I are on a trip and my bike showed the same error codes today. When we got to a stopping place, I called cobra. They had their Victory tech call me 5 minutes later. He said we could fix it over the phone. I popped open the case for the CVT. There's a square blue box on the lower right hand side. It has a red dot in the 7 o'clock position. turn the adjustment screw in the center clockwise to the 9-10 o'clock position. That fixed it for me.

That adjustment is for the timing of adding fuel at steady state, so turning it from 7 to the 9 position add's it a few more microseconds early.

Hope this helps.
That seemed to do the trick. Thank you so very much. This forum is a whole lot better than Cobra tech support. Was treated like crap.
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Old 04-19-2014, 04:00 PM   #50
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Originally Posted by slickvic View Post
Did 500 miles this weekend . O2's disconnected and no error codes. My bike ran strong and pulled very hard. Cobra is set for around 8 to 9 o'clock and my fuel mileage was around 47 to 49 mpg. Except for occasional burbling on decel with minor pops it ran great. LLoyds IAV should fix that but it doesn't really bother me.
So you know getting above 45mpg your burning your exhaust valves.
That will be a expensive fix
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