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thundermax autotune does not see either 02 sensor

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Old Jun 20, 2009 | 07:26 PM
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Default thundermax autotune does not see either 02 sensor

went to the last map it made and still runs but cant take off fast. i got home and connected to the computer and it does not read either 02 sensor, has anyone seen this issue and know of a fix? i have not reinitialize it yet
 
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Old Jun 21, 2009 | 03:25 PM
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the data port wires got cut from the bottom out i did today. i think the passenger but i wont tell her that. solder the wires and all is fine.
 
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Old Jun 21, 2009 | 03:48 PM
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so just how do you gain with one of these tuners?
 
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Old Jun 21, 2009 | 03:49 PM
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gain what?
 
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Old Jun 21, 2009 | 03:52 PM
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power/performance, is it worth the money?
 
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Old Jun 21, 2009 | 03:57 PM
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performance is great compared to stock, i dont know what gain i get but it would be from the pipes and breather and not the fuel management. that is for the right air fuel racio and the auto tune keeps it adjusted correctly for all condition i ride in. i can change pipes and dont have to pay someone to retune
 
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Old Jun 21, 2009 | 04:14 PM
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Originally Posted by tk353
the data port wires got cut from the bottom out i did today. i think the passenger but i wont tell her that. solder the wires and all is fine.
Sounds like you need to adjust your shock pre-load if you are bottoming out
 
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Old Jun 21, 2009 | 04:18 PM
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Originally Posted by hdokie
power/performance, is it worth the money?
Absolutely. Biggest return if you have upgraded your intake and exhaust, etc
, not so much if you are leaving the bike totally stock.

Might run a bit cooler and smoother and be a touch more responsive even
if you are dead stock.

They tune them to run extremely lean from the factory to meet emission requirements.
 
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Old Jun 21, 2009 | 04:21 PM
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Originally Posted by chunks
Sounds like you need to adjust your shock pre-load if you are bottoming out
i need a lighter passenger.
 
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Old Jun 21, 2009 | 05:21 PM
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Originally Posted by tk353
i need a lighter passenger.
For what it's worth I never ran my wires for the O2s according to instructions. (softail) Behind the battery and down is where I routed it. Looked at removing the plate behind the fuse box but decided that blows. Had more room between the battery and oil tank, plus gained some length in the O2 wires to the front sensor. Second thing was splice more wire into the data port section to allow the plug to fit more in the middle of the seat. It was always getting mashed from the stock position from the factory. Don't be afraid to do some custom wiring in there to make it right if needed. Viewing the underside of the seat will show any major contact areas, or use a grease pencil on parts to see where it transfers to the seat.
Ron
 
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