Hi peeps, i swaped my ecu over in MY93 wrx as soon as i did so i devloped a stutter/hesitation on boost, i've replaced both plugs and coils for new ones and the problem is still there.

But some days it's not there and drive's fine,other days i can get 7psi and no accleration,sometimes full 12psi and no accleration and other times have no problems, i've done a ecu reset and have no fault codes, like i said it all started as soon as i swaped ecu's.

I havn't had chance to put another ecu in as i thought it would be a million to one chance it being a ecu fault,but please can anyone help.

 

wot ecu do you have m8 as ive just had the same trouble

an just swapped my ecu back to a standard z4 about 10 mins ago but to cold to test now will test on way to work tommorrow