aren't the 6G75 injectors 305cc/min versus 275cc/min for the 6G74 ones? that would mean to deliver the same amount of fuel they would have to be open for 10% less time. if you're going purely by the trip computer, it's going to be off by 10% as it's calibrated for the smaller injectors.

I think 10% is within the range the stock ECU can adjust for, although you're probably running a bit rich on idle. I just wouldn't trust the fuel used on the trip computer anymore (or at least compensate by about 10%).

I might try to get some 6G75 injectors from the US... at $30 each that's crazy cheap.

cheers,
.wook