I once had a wonderful V11 Ballabio which ran smoothly, sounded great (Tit. kit) and returned 20km's/ litre then it went in for its 10k sevice and I got back a evil vibrating petrol guzzling shit box. Apart from discovering that the obvious challenge tuning late model Guzzi's presented to this particular dealer is too much I discovered that my Tit. ECU was not dinky-di. It was unusualy marked Cali but, according to the dealer, " it was the right one". I did a bit of ringing around other Guzzi dealers and came to the conclusion that it was a flashed version and my original was M.I.A.. I sent the impostor ECU to Duanne Mitchel@ FIM who replied saying that he had never seen this type before though it was the right map but it was coded MGS01/V11. Very strange.
A complaint was made to the distributors who magically found me a real one which is marked O1 on the back and organised for another dealer to install it. I went and had this done and was given back a bike that blew shitloads of black smoke out of one cylinder?????, chewed as bad as 12km/litre and vibrated like a turd. The other reassuring aspect of this changeover was that the mechanic gave me back my old standard ECU but had broken the plastic port hole. Great news. Another complaint to the distributors resulted in me sending this ECU and the fake one back to them so I could have the broken one repaired which they did.
Next step, do it yourself. A mate had imported the diagnostic software so we checked a few things. The tps was set at 2.6 so we reset it to factory settings. The bike wouldn't run. Following all the recommended procedures we ended up with the Tps at 7 odd degrees. That was just to make it idle! By this stage I had had enough so I put back in the standard ECU reset the Tps to 515mv and things started to come right. Feeling adventurous I put back in the Tit ECU. The result? No response off idle while blipping down through the gears f*** all pickup accelerating out of corners and almost conking out when you came to a stop. Apart from that it was great when you gave it the berries though the fuel consumption is never more than 16km/litre no matter how you treat it. So back in goes the old ECU.
I am on my third maybe fourth ECU and the only one that worked was the one that was in the bike before it was serviced. All of them have had different markings on them so I am sure the only way to find what they are is to get someone to read the codes. The tuning is very straight forward but i'm convinced that it can't always be done properly without a CO2/O2 meter.