So my 04 sti is messed up. I can slam the throttle wide and it will only jump to 1500rpm! and bog back down, jumps between 1500rpm and 500 popin like a snowblower. throwin codes. P0171/
p0131 and P0031. Sounds like a bad boost leak or knock sensor to me p0171 is system too lean. Car is screwed. Can get it up to 3000rpm if i tap the throttle fast like im drifting. Took off TMIC to check inlet pipe vaccume lines boost gauge line , ect. Anyone have anymore ideas or have had this happen to them? before i take her in to the tune shop, for a bank rape? Put her back to stock When the madness started.
04 sti Stg 2 COBB (butt dyno)/ Bosal catless exhaust/ Cobb DP.