Hi! (Need technical support)

[Bixxer Bob]

I'm guessing they've fitted an O2 sensor bypass.  You need to find the O2 sensor plug on the main loom - if it's like a 955i it'll be under the tank and airbox, ontop of the cylinderhead near the left coilstick.  The plug will have one purple, one black one white and one grey wire  (that's from mremory but look in the recent PM I sent you to be sure).  My guess is there'll be a black plastic device plugged into it if it's a Dynojet one, or it may just be a resistor across two of the pins if they've done a lashup.  Either will fool the ECU into seeing an O2 sensor.

Right now, I stand by what I said: get the right map in, get the long term trim down to between 4.1 to 4.5 , set the stepper motor steps to about -10 and see how it goes before you throw any more money at it.

[ChazzyB]

Someone removed it.

The Interesting thing is;

Why TuneEcu didn't give any trouble codes about it?

The ECU ony registers a fault and stores a DTC for the O2 sensor heater circuit missing.

I recently tried resistors in place of the O2 lambda sensor. a big wire-wound 330 ohm job replaced the heater circuit and a small 1 mega ohm job made the ECU think the sensor was giving 4.3 volts (4.5-4.6v is Lambda-ish). I had wanted to use a 1.2 meg ohm resistor but couldn't get one in time. I had measured a chum's Dynojet plug to get the 330 ohm /1.2 mg ohm values. I could use the plug myself as it was the wrong connector for my bike. It was the wrong connector for his bike too.... ;-)

[Bixxer Bob]

Good info Chazzy but, as I was trying to get across to Hassan, the whole O2 thing is a bit of a red herring.  The O2 sensor missing isn't going to cause the problems Hassan is having.  He needs to get the bike back to base settings first.  He's been running a Daytona map with an long term fuel trim of over 11  :shock:

Most likely, the previous owner or his dealer removed the O2 sensor because it wasn't working not realising that the non functioning O2 sensor had already wound the trim up to 11.  When it wouldn't run right they sold it on.  Only guessing of course but the theory fits.

If he gets the base settings right, it'll run somwhere near normal, then he can work through the fine fettling until it's ok.

[Hassan]

Thanks,

I'm afraid they also not fitted an O2 eliminator...

 :shock:  

On the right side,there's a Lonely black socket...

With six pins and four wires on it,he's waitin' for the day he'll transmit volts again...

   :?:
 :D

[Hassan]

I'm interested in bypassing it,if I can fit the voltage to "normal" settings,it'll be alright and save my 100 GBP's.

I'll do the tuneecu settings in the afternoon.

[ChazzyB]

I'm interested in bypassing it,if I can fit the voltage to "normal" settings,it'll be alright and save my 100 GBP's.

"Bypassing" the O2 sensor is done with a pair of resistors, as per my earlier post. I used a 3 watt wire-wound 330ohm resistor across the sensor heater pair, as I'd read of smaller sized components getting very hot. For the sensor itself, I used a small metal film resistor.

[Hassan]

Is it alright if I fit the voltage to 4.5?

My bike is a '99 Tiger.

[iansoady]

I'm interested in bypassing it,if I can fit the voltage to "normal" settings,it'll be alright and save my 100 GBP's.

"Bypassing" the O2 sensor is done with a pair of resistors, as per my earlier post. I used a 3 watt wire-wound 330ohm resistor across the sensor heater pair, as I'd read of smaller sized components getting very hot.

Not sure why that should be as with 14 volts across it it's only going to be taking .04 amps ie around .5 watts.....

But probably better to be safe.

[Hassan]

I'm sorry guys,There's a misunderstanding (My Fault)

My bike is actually a Kawasaki KLR 650 !!!!!!!!!!!!!!!!

 :shock:  :shock:  :shock:  :shock:

HAAAHHH HAH HHAHH HAHHH....

 :D  :D  :D

Just joking.

My bike actually doesn't have any O2 sensor as original,so just like in Sprint models the O2 thing is manually adjusted.

I've seen the O2 sensor in the parts locator and thought it's on 99 models but it belongs to mark II of 885i's I think (model 2000)

Hmm,what's that black socket then???(next to the injector sockets near the starter solenoid,with four cables and six pins on it)

This thing is getting more complicated in each step...

:icon_scratch

[Bixxer Bob]

It's probably the redundant socket that folks ask about from time to time.  Can't remember what it was for, but it's not used on the Tiger.

So you never had an O2 sensor, but you have a Daytona map.  I can't think what the previous owner / dealer was up to.  Hopefully resetting the trim will be a step forward.

What I'd give to have this in my workshop for an afternoon instead of trying to help from 1000 miles away...  :roll:

[topher0268]

Now I'm considering coming up with a fictitious problem with my Tiger just to have an excuse to bring it to your shop ... always wanted to ride through your neck of the woods  

[Bixxer Bob]

Given the lack of success with Chazzy B, Metalguru or Hassan's issues, you'd be a brave man  :roll:

Meanwhile, I'm running fairly happy with the new Triumph tune  :)

[topher0268]

what can I say ... they're made of brass  8)

Besides I've heard good things about this warm beer tradition you fellas got going on across the pond ...  I mean that's just weird .. but I'll try anything twice  :D

[Hassan]

Thanks Guys.

[Hassan]

It's hard to understand why it started to have a high tickover just after the Tps resetting...

Changin' the stepper and CO settings helped the rich running problem I think.

Thanks Bob.