Hi,

fist of all, a big sorry for my bad english.

I have postet this problem in pgmfi.org before but i didnt get the hint i need, so i hope sombody from this forum could help me.

We are some lucky guys in germany and we have done some turbo setups on diffrent honda types.

everytime we modified the ecu to use a custom 27c256 in it. and we modified the stock program with crome. we added the boost tables with boost+ included in crome.
Then we put a boradband lambda probe into the car to make the fine tuning in the fule adjustments.

the setup works fine.

The problem we have is everytime the following.

the ecu trys to regulate the lamda value by itself until we reach 4700 U/min or we give full throttle.

when we drive with 3/4 throttle by around 3000 u/min we get in the partial load range of the boost and the ecu always want to regulate the lambda by itself.

if we use a OBDO, we get in the crome utility a option to select wich turns the O2 off under boost but this option dosent work.

and if we use a other ecu (eg OBD1) we didnt get the option to select.

we want to get the ecu to stop regulate the lamda value when the boost presure reach 0 psi.

as long as the turbo charger deliver no boost we want the ecu to regulate the lamda value and only when the turbo charger makes presure we want to stop the ecu to regulate.

and i think this is possible by telling the ecu to use the mapsensor, it should deliver a specific value when the boost reaching 0 psi.

We are deeply grateful for any hints or any help.