boustie.sti

Hi just bought a 96 sti which has been fine up until today. When i accelerate hard on full boost about 5000 revs the car holds back for a second slight pop from exhaust carries on does again a couple of times.
has a few mods not done by me td05 20g apexi fc remap etc.
Any help greatly appreciated as im new to the classic worried it could be something serious.
thanks

boustie.sti

oh has a greddy boost controller if that helps

WRXMATT

Overboost leading to fuel cut or needs new coils, possibly?

scoobz72

you could turn your boost down. Mine wanders all the time despite an accurate boost controller. I now run at 2psi under what my safe full boost is. No probs. Prior to that i was being cut all over. Turned out to be the pipes split.

boustie.sti

used 97 ron on saturday i know that may not help.
if it was fuel cut would the car still rev through it?