Slattery Gts-t

I cant seem to lower the boost, it boosts to 0.5 Bar then after 4500 revs the boost starts building with revs until redline and then its boosting 0.8 - 0.9 Bar. I have a vacuum line running straight to the wastegate bypassing the boost control solenoid. Does the boost rise because the wastegate cant flow more exhaust gas due to it now being highflowed ?

Problems back! Disconnecting the battery fixed it for a day then it started playing up again, since then i have replaced the AFM with a brand new one but the problem is still there and still intermittent like before, iv got no idea where to go from here

Hoping someone can give me a bit of information here, I recently brought an R33 gtst and the bloke i got it off said it had a highflowed turbo but thats all he knew about that. The impeller is aluminium and being a series 2 it should be nylon so this leads me to believe it probably has been highflowed. My questions are is there any way to tell for sure it has been highflowed? How much boost is "safe" for a highflowed turbo? also where might it have been highflowed how many places actually do it ? Oh and the car has 3' pipes from turbo back, Pod and a big FMIC

Well so far so good, left the battery disconeccted for 20 mins or so hooked it up and has been fine since Hopefully its sorted, time will tell

Thats pretty much exactly what its doing! Just read the fault codes and its coming back with code 21 = Ignition signal, Ill reset the ecu by disconecting the battery and see how i go

I recently brought an R33 GTSt series 2, on the way home i noticed from 3500 under boost it just doesnt pull very hard. I changed the plugs to PFR5G's gapped to .7 and just replaced the splitfire coils with yellow jackets but didnt help so i assume my splitfires are ok. The car runs good for about 5 mins then starts playing up like this sometimes when it hits 5000 revs it misses and backfires, If i stop the car turn it off restart it and take off its fine for a few mins then plays up again As far as i know the car has a high flowed turbo thats all i know about that, 3 inch exhaust and dump pipe running factory boost. Im not sure where to go from here its getting to be a pain! maybe AFM ? i dont think its Rich & Retard as it does it at only a few psi Oh and i have searched and read numerous theads on this forum i dont mean to offend anyone by posting another thread on this topic but i dont think i have read one where restarting the car temporarily fixes the issue