I followed the directions here and found an error... on my ep91 i had to switch around the green and white wires...
that is the green wire runs to the sensor and the white wire runs to the ecu...
later...
you should check the lines you use to hook up the mbc... make sure they not too small or long as they will cause some restrictritions and cause the creep... this is true for mbc an ebc... ebc usually better cause u leave everything in the bonnet some ppl try to run the mbc into cockpit.... too...