You can check it with a digital volt meter. With the front throttle plate fully closed you want to rotate and adjust the TPS to 150 mV.
The home method:
Cut a slit in the sheath on the wires to the TPS. With small pins you can probe the purple/white and the red/white wires. These are where you read the milivolts for the setting. It'll take a few tries as when you secure the TPS the readings will change. I put a small length of wire on the red/white harness wire that exits the harness for future ease in measurement. ** Be sure to seal it all up with rtv and tape to keep water out.
I checked the reading several years later and it only drifted a couple mV from my 150 setting.
I just measured the TPS, it read 75 mV. I tweaked it to read 150 mV as suggested and secured it.
The bike started just fine. I can't take it for a spin as it's my track bike and it's dark here at the moment. It's been hard to cold start, now it started right away. I'll see how it works over the next couple of weeks.
Was the 75 mV way off or within acceptable tolerance?
So yea, pretty straight forward, I'll get to try the bike on the track next weekend.
75 is waaay lean. It should run much better now and you'll notice it is generally smoother through the range.
Ok, I'll be interesting to see how it runs now. It wasn't bad before, but things can always improve.
I guess the PowerCommander richened it up a bit, now I'm curious, is it too rich now or just perfect.
Obviously, I should have done the TPS before the PC dyno tweaks, but I didn't know better back then. Although, the dealer should have sugested to sort out the TPS and throttle bodies first, one would think.
I've also balanced the throttle bodies, they were also way off.
Obviously, I should have done the TPS before the PC dyno tweaks, but I didn't know better back then. Although, the dealer should have sugested to sort out the TPS and throttle bodies first, one would think.
I've also balanced the throttle bodies, they were also way off.
Hmmm...
If you do a custom mapping with the TPS at something-else-than-150mV then you should be fine since you have a map that is optimized for something-else-than-150mV.
But if you change your TPS setting to 150mV, then your optimized custom mapping would not be optimized anymore, since the ECU will be looking in the wrong place of the map for a certain throttle opening angle.
Or in another way: changing the TPS setting is equal to changing the throttle breakpoints in the map.
Setting the TPS to a certain voltage (Ducati has choosen 150mV) is just a way to get different bikes less different to be able to use standard maps for all bikes.
Just my 5c...
Forget the abow, I completely forgot the ignition map, that hasn't been changed and of course would be most happy with the 150mV setting.
redtop, I agree with what you said, messing with the TPS after a custom map been made would probably mess up things.
That said, I haven't done a custom map yet, I was going to wait till I install 999r cams. I'm not sure what that is going to happen though... I sorta promised myself not to do any engine mods the first year, just learn to ride the thing first.
Also you may want to check that the throttle bodies open fully, on one 998 i mapped I had to grind the stop quite a bit to make it open fully.
Hej på er!
Tjena!
I just got back from the pub and saw your post. I went down to the garage and had a look. I'd say the throttle bodies opens up about 85 degrees at full throttle twist. I have to connect the VDST to get the actual reading.
I can see the opening is stopped by the arm holding the idle screw. Is this the one you grinded off? Are the throttle bodies supposed to open fully 90 degrees?
I just got back from the pub and saw your post. I went down to the garage and had a look. I'd say the throttle bodies opens up about 85 degrees at full throttle twist. I have to connect the VDST to get the actual reading.
I can see the opening is stopped by the arm holding the idle screw. Is this the one you grinded off? Are the throttle bodies supposed to open fully 90 degrees?
cheers
johan
Grinded the arm yes. The bike I referred to was more like 70, 85 is ok.
989 TPS setting?
Linear Mode
