Bosch M1.5.5
Posted: Sat Sep 05, 2015 7:19 pm
Hy guys.
I'm a bit far from all of you, but i found several good informations and a lot of work on your forum that could help me.... and the most important you love alfas !
I own a 1999 GTV with a 2.0 TS (16V engine with VVT) and a Bosch M1.5.5.
There is only 1 ECU model for all these GTV : 350386 0261206061
I have fully modified my engine with longer cams durations, ported head, new exhaust header, hi compression piston, lighter rods and flywheels, remove the balanced shafts, increased oil pump pressure.
As the LCA is very small on the original cams, the ECU was a bit lost with the new set up.
I sent the car to the local dyno shop to get the maps tuned, and this was made greatly, with a nice result.
But I have to made a part of the job myself.
The idle still not working properly, the guy have adjusted the screw on the butterfly but seems not change the target iddle in the ECU.
So the idle control motor try to decrease the engine level ... making thinks unstable sometimes.
The other problem is that the engine stop if the engine speed decrease too fast (this is my thinking) as when you push the cluch pedal.
the engine is running fine when the weather is cold.
The Bosch documentation say that the ecu is slowing down the engine speed before a little bit under 2000 rpm.
The M1.5.5 is not really detailed on the web, probably beceause there is not so many people interested to modify this small alfa.
I have the original bin file and also the modified one.
I woudl like to get some advice, how to find the maps and also some advice about how the idle and "slowing down engine speed function" could work.
Not all the ecu seems managing theses 2 functions in the same way, so as i'm a newbie i need help to go ahead.
I also want now to go for other modifications and I would like to be able to set up myself some stuffs.
Thanks for your advices and answers.
Ps: Hope my english is ok.
I'm a bit far from all of you, but i found several good informations and a lot of work on your forum that could help me.... and the most important you love alfas !
I own a 1999 GTV with a 2.0 TS (16V engine with VVT) and a Bosch M1.5.5.
There is only 1 ECU model for all these GTV : 350386 0261206061
I have fully modified my engine with longer cams durations, ported head, new exhaust header, hi compression piston, lighter rods and flywheels, remove the balanced shafts, increased oil pump pressure.
As the LCA is very small on the original cams, the ECU was a bit lost with the new set up.
I sent the car to the local dyno shop to get the maps tuned, and this was made greatly, with a nice result.
But I have to made a part of the job myself.
The idle still not working properly, the guy have adjusted the screw on the butterfly but seems not change the target iddle in the ECU.
So the idle control motor try to decrease the engine level ... making thinks unstable sometimes.
The other problem is that the engine stop if the engine speed decrease too fast (this is my thinking) as when you push the cluch pedal.
the engine is running fine when the weather is cold.
The Bosch documentation say that the ecu is slowing down the engine speed before a little bit under 2000 rpm.
The M1.5.5 is not really detailed on the web, probably beceause there is not so many people interested to modify this small alfa.
I have the original bin file and also the modified one.
I woudl like to get some advice, how to find the maps and also some advice about how the idle and "slowing down engine speed function" could work.
Not all the ecu seems managing theses 2 functions in the same way, so as i'm a newbie i need help to go ahead.
I also want now to go for other modifications and I would like to be able to set up myself some stuffs.
Thanks for your advices and answers.
Ps: Hope my english is ok.