overboost :(

[nuki]

hello. Just noticed tonight that boosting is not right i dont think.
eg... 3rd gear rolling at 2000rpm full throttle boost goes to 10-11PSI then when i reach just short of 5000rpm i get a boost spike of 13PSI then the 2nd turbo comes in... then suddenly drops to 8PSI untill i hit redline. Im not driving full boost now i think theres a problem ive done it a coupple of times and it does the same thing.
 
Also sometimes when i change gear suddenly from 2nd to 3rd after about 6PSI of boost i get the BURRRRRR noise from the engine and no turbo.. i have to change gear to get my turbo back. But that only happens now and again.
please help problem after problem at the moment
Car is running standard ECU. NO de-cat. 2 HKS filters and standard intercooler.
 
Thank you.

[neil_jdmr]

Mine was doing the same and done my head in for nearly a year before i bought my pfc took it to pip and let a pro sort it. He said it was boost creep caused by a too much free flow through the exhaust.
 
He had me back on the road with the decat and pfc and a monster smile in 2hrs
 
All i had was a standard ecu but with hks filters and a nur spec back box.
 
The fault was with the factory ecu mate not being able to cope with the above mods.
 
I know what with the credit crunch etc now may not be the time but you need a pfc really mate, otherwise for a quick fix put a restrictor in your exhaust system maybe.

[nuki]

yer power fc is what i need but the thing is why has this problem just started now? this was never an issue

[m1tch]

Perhaps check the error codes to see what it throws up?

[neil_jdmr]

yer power fc is what i need but the thing is why has this problem just started now? this was never an issue

Now that is a good question as my car always did it fresh from the running in period?