subiesin1 Posted November 12, 2019 Share Posted November 12, 2019 Hello all, have been having a very annoying problem with my subie. I have a 2005 legacy gt with a turbo back exhaust and a pro tune. At around 2400-3000rpm anything above 2-4psi of boost will cause knock on my access port and what feels like the engine choking or losing power.this does not happen at wot, or if I let the RPMs build up without boost. I’m at 110k miles, no check engine light. Original 02 sensors, cleaned maf a few months ago. Tuner thinks it’s a fuel pump as he’s had to add more fuel when he shouldn’t have to. Any insight would help a lot. This knock happens on his tune, on the base Cobb tune and oem edu. Link to comment Share on other sites More sharing options...
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!Register a new account
Already have an account? Sign in here.Sign In Now