[David 76]

Hi Everyone.
My name is David, I'm 42 year old and I'm french (nobody' perfect... )
I apologize in advance for my poor English...
I'm an happy 205 GTi owner since 2007 and i have the project to use a speeduino. My car is actually running with original Bosch ecu
The main idea is to reduce fuel consumption, not to increase performance. The 1.9 N/A is enough to enjoy small road...
Constraints:
- No or only few minor modification of the car wiring.
- keep the possibility to return to the original system quikcly
- Stay as close as possible to the original look of the engine bay

I'm using a V 0.4.3c board with a chinese copy of the mega 2560
flywheel from peugeot 406
TDC sensor from golf 3GTi 16v (fit in place in the gearbox with an easy minor modification, hall effect no VR conditionner needed)
original injectors and coolant temp sensor
LSU 4.2 sensor and 14point7 electronic.

[David 76]

3D printed case to fit in place of the original ecu inside the glove box

[PSIG]

Welcome! That looks like a fun project! I also maximize fuel economy on all my projects, and it is fun, if it is not obsessive.

[Chipboy]

Snap, got one like that too, going to speeduino it with Mi16 in it.

[Shalmaneser]

I had a 205 GTi with a 306 gti6 motor in it - a lot of fun! Looks like you have a lovely example there.

[Spesh]

Hello fellow pug owner!

Do you have anymore details on the hall sensor modifications? I'm still running a 306 VR sensor and am considering changing to hall to reduce complexity

[Chipboy]

I have a Mi16 and Xsara VTS box both with 3 wire Hall, the poor old 205 with its ancient injection system will be simple to replace as will most of the electrics.

[David 76]

Hello fellow pug owner!

Do you have anymore details on the hall sensor modifications? I'm still running a 306 VR sensor and am considering changing to hall to reduce complexity

you have to remove the green O-ring and cut the small collar just underneath

[David 76]

Hello.
My 205 works well with its speeduino.
Now I want to turn on flex fuel,
I bought a sensor, put it on the car and wired it.
I welded a pull-up resistor, I mesure on the pin 43, 4,9V with unplugged sensor and 4,1V plugged sensor (10% ethanol on the fuel).
The gauge always remains at 0.

Worse still, I don't have fuel injection when the flexible fuel is activated. Even with a 100% correction on the table, unmater the ethanol value.

any idea of the problem?

[David 76]

I found my stupid mistake, a bad wiring on the proto area. the pin for the flex input is the N°2 not the n°43...
Yellow wiring is the first attempt... without verifiying the pin N°.
Red wiring is the new, the flex sensor works fine now.
Like mentionned on the wiki, no pull-up resistor needed.