hi all im new to owning a wrx import it has a td05 turbo and a turbo back exaust system as far as i no lol.when i accelarate hard it gets to about 4500rpm and its like hitting the limiter but its verry violent.can any one tell me what this is.
all help apreciated.

 

Is the CEL (check engine light) on as 4500rpm is normally the limit when the ECU is in 'Limp Home' mode (protecting the engine from damage) even if it's not on have a look here Scoobypedia | Trusted knowledge for everything Subaru | Scoobypedia / Scoobypedia under the 'ECU' heading on a how to check for error codes and reset the ecu.

 

sounds like fuel cut is another possability
does it pull hard until 4.5k rpm and then cut power?

 

Sounds like fuel cut to me.
Cheapest way to cure it is with a fuel cut defender, but there a bit crude.
You really need to get the car mapped properly for the mods that the car has.

What year is the car on, if its a 94-97 car then you might be able to buy a "scoobyecu" sencond had from this forum

 

hi thanks for the replys .when i had a look thismorning at the car the pipe on the botem of the boost solinoid was drawing air as the pipe was just hanging loose .its a 1993 wrx .

 

Reconnect (as i'm sure you have done )it as that hose has a restrictor in it and on the early cars without it you will get overboost leading to fuel cut