Xr2iTurbo

as title weather driving it or just stationary when rev above 4k it seems to hit what i would describe as an early rev limiter,it splutters and runs rough for about 10sec max then goes back to normal and drives fine.it drives nice all the time if kept below 4k? Any help much appreciated id like to sort this prob before gettin it back on the road and set up again,could it be a sensor?car is chipped,beige injectors,uprated pump,t28 turbo,head ported and polished,piper cam exhaust,actuator ect,thanks for any help and replies its realy doin my head in now,ive had injectors cleaned and nothin has changed

gary fraser

You checked for any air leaks in your hoses

mrjenrst

fuel pump?