Hello!!! I'm new......
On my 500 1200 of the year 2012 I install a turbo in low pressure (max 0.60 bar) with no engine modifications. Is the third car in which I make this work..... but this time to adjust the fuel mixture is very difficult !!!
I mounted an extra injector and a Ecumaster DET3, initially seemed fine but a couple of days the idle has become irregular and yesterday if I use the map changed the car off and then does not go more start. When turn the switch on ZERO MAP the car start but turns bad at idle. I suspect that the DET3 not work well ......(Occasionally appear on the maps strange values!!!)
The main problem is that the car is euro5 and injection is very precise, often takes me errors misfiring or crankshaft position.
Maybe ECU adapts to by pass the DET3??!
Someone give me some help?!?!:worship::worship::worship::worship::worship::worship::worship:

Although my experience is not on a Euro-5 car, I did fit a Rotrex Supercharger to my Euro-4 1.2 Panda 4x4 and got pretty much the same initial issues as you. With NO OTHER modifications other than a 2-Bar MAP sensor, the stock injectors max'd out at about 95bhp and it was running way too lean for a forced induction engine. So I increased the size of the injectors (up from 150cc/min to 200's) and made no real progress, as the engine runs CLOSED LOOP pretty much all the time. So it was always trying to get to 14.7:1 stoic. Annoying.

So we decided to go for an external piggy-back fuel controller and force the fuelling higher...... But that didn't work as the stock ECU just saw the extra and backed off the fuelling from its map. And all the time gave me a see-saw idle that was really frustrating in traffic.

The solution was to get the OEM ECU properly reflashed to set the AFR goal to be richer, as demanded by a supercharged engine. We aimed for about 13:1 at full throttle and them rejig'd the map accordingly for other points in the setup. Worked a treat after that. We should have gone the Flash Update route right from the start, but my tuner chap didn't have the ability to crack the Magnetti Marelli in those early days (2009). Ended up with 110bhp and 105lbs/ft and it was a great success.

The engine had always been a heavy breather (much blow-by gases being recirculated, even before I started), which I should have noticed, so supercharging was never going to have helped the situation. Eventually though I think I pushed it too far and crank venting became quite difficult to do cleanly. I couldn't pipe the gases back into the induction as the fumes were oil-filled and upset the lambda's really badly, so it needed venting to atmosphere, which is OK day-to-day but not for the annual MoT (technical test), so I decided to move the car on and go for a new shape 4x4 TA, which right now I love.

Good luck!

Hello, thank you for your answer and your help
I finally decided and I opened the engine .... the piston 2 broke !!!!:bang::yuck:
I'm thinking of putting 4 pistons of the old Punto 1200 16v to decrease ratio pressure. I m very disappointed .... it broke after less than 300 km ...... but turned lean!:worship:
I ordered a head gasket reinforced Spesso Racing... to begin!


let's see how it ends