i added a 3" exhaust. After awhile when i floor the pedal my car gets stuck on 4000rpm and starts reving and after like 3 secs it goes back to normal. It happened more than once. Can smone help pls ?
any exhaust is specifically designed for the efficiency of the motor/system/setup, generally speaking. I don't know how much of your exhaust is now 3" (cat back?) but it can greatly alter the flow and fuel ratio and dynamics of the exhaust system. I would wait for expert advice from here or go onto impreza or NASIOC forums and ask for advice on tuning to fix this. Best regards,
Search Subaru Impreza Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Subaru Impreza Experts