O2 sensor bypass - Ducati.ms

GReeK · Apr 21st, 2009, 6:27 pm

whats everyones opinion on this?. I have a full Arrow, Beast-R intake and DP ecu. Cams not installed until 7500 mile service

Monstaman · Apr 21st, 2009, 6:38 pm

That is a very open question, what are you wanting to know?

If you have the DP ECU you should unplug the o2 sensor or it will still pick it up and accept information from it effectively not keeping any points changes you may make.

GReeK · Apr 21st, 2009, 6:45 pm

I havent gotten the bike dynoed. a buddy told me to have the throttle bodies synchronized and the tps set. The bike sounds like it runs rich. Should I invest in a PCIII and get it to the dyno to get it profesionally tuned? or should I just try my luck by unplugging the O2 sensor?

Monstaman · Apr 21st, 2009, 7:01 pm

If your o2 sensor is connected then yes disconnect it and plug the sensor hole in the pipe or tie up the wire to the sensor as long as it is disconnected, the DP ECU will run without it and by all accounts is meant to.

I think you will find a marked difference, who said to leave the o2 sensor in place?, also have you adjusted your air bleeds?, do you by chance know how many points you ECU has been fueled up if any?

I suspect it will be running lean due to the o2 sensor.

Let us know on the above.

dukepilot · Apr 21st, 2009, 7:04 pm

Quote:

Originally Posted by GReeK

I havent gotten the bike dynoed. a buddy told me to have the throttle bodies synchronized and the tps set. The bike sounds like it runs rich. Should I invest in a PCIII and get it to the dyno to get it profesionally tuned? or should I just try my luck by unplugging the O2 sensor?

Yes, unplug the 02 sensor and plug the exhaust port, you don't need the 02 sensor with the DP ECU. Get it professionally tuned by someone that is reputable that you trust, not just some Dyno Jet jocky. Have them adjust the fuel trim first and take a baseline run then decide whether you want/need a PCIII.

GReeK · Apr 21st, 2009, 7:11 pm

Dont know how many points its been fueled by. and excuse my ignorance. I dont know what that means. First thing tom morning I'm unplugging the O2 sensor. and Sat it's going to a very reputable Duc mechanic for tuning.Luckily here in Florida we got one of the best DUC mechanics in the US. will keep you updated

Thank you

Monstaman · Apr 21st, 2009, 8:09 pm

Now you are talking, when I say points, that is you can alter the fuel pulse width with either a VDST or the stealerships diagnostics device.

As a guide, I have open air top and bottom, K&N filter, Zard Headers and Termi slipons opened, mine is set at +14 on the scales but remember EVERY bike is different and will require differnt settings.

Get the stealership to adjust it properly including, points scale fueling, TPS, sync TB's if needed and you will find a marked difference.

dukepilot makes a very good point about wannabes thinking they know when in fact they don't so it is worth taking that on board.

GReeK · Apr 22nd, 2009, 10:39 am

Ok spoke with my tech. He said the O2 sensor is not being used with the DP race ecu(the one that comes with the cams) its automaticly disables it. But He told me to bring it in to set the TPS and the TB. so I'll let you know Saturady.

thanks for the help

Monstaman · Apr 22nd, 2009, 3:23 pm

Quote:

Originally Posted by GReeK

Ok spoke with my tech. He said the O2 sensor is not being used with the DP race ecu(the one that comes with the cams) its automaticly disables it.

At least unplug it from the loom to be sure as I am not so sure that it does automatically disable it, it doesn't with the DP ECU for slipons.