Power Commander 3 throttle position help

[southgate]

So just put the baffle in the Leo Vince can on my RR8 Fireblade, and uploaded a suitable map for the setup.

Whilst checking the map had correctly gone over to the PC3, I noticed that whilst idling (idle hunting a bit between 1190 to 1250rpm) the PC3 software on my laptop was saying the throttle position was at 38%. Obviously idling I wasn't touching the throttle!

So now I go into the software > power cammander tools > set throttle position. I set the closed throttle value for what is being shown as the current value with bike idling, and sure enough the software reads 0%. I enter the value at full throttle for the 100% box and click ok, but get a warning that the range is smaller than recommended..... Am I doing something wrong?

Bike doesn't seem to run much different to before I made the adjustments.

[southgate]

Hi Hooli, yes bike was thoroughly warmed up before throttle calibration.

Starting to think I may have a dodgey TPS or throttle bodies are out??

Basically, following the power commander instructions (as I understand it), it gives me a wide band between closed and open, but the screen is telling me the bike is at 38% throttle when idling (now it actually says 60%!).

If adjust the values manually to get the screen sayning 0% throttle at idle, the band from 0 to 100% looks really narrow and flags up a warning message. Not sure where to go from here? Maybe strip tank off and test voltages from TPS, if I can find some guide values that is..

[southgate]

Anyone got any ideas how to tackle this. Something I haven't thought of?

Do I bite the bullet and change the TPS sensor? Running out of ideas and don't want to be without bike as weather getting nicer

[southgate]

Cheers for that Bass. Yep, got a digital multimeter, will check tomorrow lunch time and report back.

[southgate]

I'm 99% sure this little sucker is the TPS sensor:



It's measuring a constant 4.95v at 0% throttle, bike running or just ignition on. Doesn't seem to change when throttle is opened.

Have I just answered my own question? Something else I've overlooked or cocked up? Bike doesn't seem to be running particularly rough...

[southgate]

bass gt3 said:

You can't measure with the plug disconnected!

Doh! The plug is sealed / weather tight, so do I splice a wire onto it?

Will it work with the PC3 disconected and TPS plugged in standard fashion?

[southgate]

bass gt3 said:

How does the PC3 pickup/connect to the TPS to give the PC3 it's signal?? Put the +ve probe where that connection is made

It piggybacks (right term?) between the OEM male and female plugs.

I.e. you unplug Honda plug and the PC3 has 2 OEM fitting plugs the join between the TPS and Honda loom.

[southgate]

Thanks. I have a pack of wire splicers, so will crack on. I was going to plug the TPS back into the Honda part of the loom first, just to discount a fault on the PC3 side... Good idea or not?

[southgate]

Right, some results, although strange.

With ignition on, bike not running, TPS shows 2.9v and PC3 software says 100% throttle (voltage doesn't change when throttle moved)

Bike idling, voltage drops to 2.0v, PC3 software says 60% throttle

Hold throttle to show 3,500rpm on bikes rev counter and voltage now drops to 1.7v, PC3 software says 45% throttle

What do you think?

[southgate]

Just checked with PC3 not attached and showing same trend of voltage dropping with twist of throttle.

Voltage reads higher when ignition on, not running - no change in voltage as throttle opened. When running and idling voltage drops a little, getting lower as throttle opened.

[southgate]

OK, so after some googling, it seems I've been a f***ing donkey and made the mistake of mixing up the MAP and TPS plugs, both same plug and next to each other!

Back to normal service please....

[southgate]

Thanks for taking the time to reply, much appreciated even if it was just me being stupid!