Hi All,

I got a 1997 Ducati 916 Monoposto on which I have replaced the Magnetti Marelli device by a MkiV My16M.
I have also added two O2 sensor with exhaust pipe modification.
No hardware issues, quick support from Cliff and first electrical testing OK.
First "firing" test, bike completly cold, and with some efforts and with the "Sport.ecu" file provided, it fires ...
I spend some time to find a good idle, but I struggle a lot guessing that the map I got was too reach.
I finally hat to do a road test cause i was changing of house ! A bike not driveable at all ...

A few months later, I get everyhting out of the garage and work on it.
As the bike was running very badly, I got an Original Magnetti Marelli dump file from stock 916, spend 3 days to interpolate everything and calculate a new base map : Injection Duration AND Spark advance.
I build the file, load it into My ECU, start the bike ... it works. And pretty well in fact.
I ride it a few km with some idea to optimise 2 or 3 things.

The next day, I took the bike for 30 km in the morning.
Surprisingly, it seems to work not as good as the previous day : the morning temperature was quite lower ... ???
The bike stalls 3 or 4 times at very low regime.
I take it at the end of the afternoon to come back home (quite higher temperature) but same thing.
After having a look at the map, I find that at low TPS and RPM, there was a "hole" in the injection duration.
I build a new file and open the ECUcontrol1.50.
And then several issues :
- The loading operation of the map seems to "never end" : the cursor moves along the whole map and I have finally to close the program after 5 iteration of that kind. It works perfectly well with old "ecu" file -> is it a question of format ?
- More annoying issue : my idle TPS that was around 65-70 at idle is now around 300 when I turn on the bike AND the maximum achievable TPS that was around 900 is now around 700 -> Electrical Issue ??? And the RPM moves from 1500 to 5000 lots of time ...

Ok, I will test the Beta version tomorrow.

I'm really confused for the TPS and try this evening to start the bike. It starts but work really bad.
The real-time RPM moves from 1500 to 5000 each 4 or 5 seconds and then comes back but the real RPM of the engine (by hear) must be ~1500.
Before starting, the real-time throttle value is about 280-300 without touching anything and the bike starts like that ...
Everything seems to work like if real-time RPM and real-time TPS were "false" ...

I will report after the Beta test, thanks !

Absolutly, I was talking about the Tacho : the real RPM doesn't move at all.

I download the ECUcontroller Version1.60b this afternoon.
Launch it ...
Indicated ECUcontroller TPS around 180.
I take the last modified map I got and load it to the ECU.
It seems to work well with no more loading issues, you were right.

I shut down and then dismantle the ECU connector to get the TPS measured value  as you have suggested.
Re-plug everything, contact on and WITHOUT doing anything :
Indicated ECUcontroller TPS around 60.
Max Indicated ECUcontroller TPS around 1000 when I move the throtlle !

But short time joy ...
A few seconds after, without touching the key or the ON/OFF button, the ECU re-initialize itself (fuel pump sound and so on)
AND ...
Indicated ECUcontroller TPS around 600, Pressure, Temperature and Battery Voltage completly false (1070mb / -20°/14,8 V).
I try to disconnect everything and wait some time but nothing change.
At least, this re-initialize phenomenom occurs each 5 or 10 seconds.

I've tried to measure the TPS and found around 380 mV, but really not sure ...

I Do not touch anything for an hour to change my mind !


Re-plug everyhting and this time I check with the optimiser.
Indicated TPS around 100 !
And a few seconds later after having moved the throttle : 60.
I check with ECUcontroller1.60 : same thing, real-time TPS around 60, eveything stable, a "re-init" of the fuel pump after maybe 1 minute but same values and still stable after ...
The air pressure value seems low (944 mB) but if I remember well it was a subject of another topic. The battery voltage was indicated at 10,8V, low also ?

I've checked several times in the past few hours and it doesn't move anymore.
Weather too bad for a road test today. I'll try tomorrow if I find some time and maybe play a little with the Optimiser after.

Quote:


Very low. You need a battery showing 12.5V or more.
Lotsa strange behaviour can occur if low voltage.
Is it that low measured directly at battery?

Until you get correct values for all the analogs and not have the ECU resetting for no reason, it is pointless to even start the bike.
Closed loop you should also not be considering at the moment.

The changing TPS values could indicate wear in the throttle bodies/linkages but in light of the other strangle behaviour it may be something in the ECU.

The analog inputs ( 7 of them ) are on the main chip are from pin 40 down. That's the top left pins of the chip. Find out which one corresponds to the throttle and you can use that as a convenient test point. Let us know which one it is as I'm not near any bikes at the moment. This will be for the My16M only.

Yes thats the way it comes from the factory. Don't change this.

That's correct.

Trailing edge