hi guys

installed a z4 ecu in my 93 import 240hp.
took it 4 a short drive boosted and drove as expected.
took the car out again this evening and opened up throttle
not madly..loss of power through the revs...?? its like it was holding back
all the time, wouldnt let me go any higher?? oh and i put a tenner of 97ron in.
please help !!as im going to sell the bloodly thing if this carrys on
what the hell is wrong with this bloodly car??

 

Reset the ecu again by disconnecting the battery then go for a longer drive (30mins+)varying speeds through the gears (don't have to do illegal speeds) and see what happens.
Make sure you put in the fuel you will be using most of the time.
This happened to me when i first put mine in.