The car is a 2002 bug WRX with Sti Intercooler, pink injectors, janspeed exhaust system, and TD04 hybrid, running about 320bhp.
Hi all, first technical post for a while. So, short story, it’s running horribly over about 4K revs. Video link attached. Weirdly it doesn’t seem to do this under load, but does feel down on power.
It had its MOT last week, which meant exhaust swap, and also plugs and oxygen sensor changed last week. Now it’s doing this, and I’m also getting a weird noise on full boost, almost like an electrical noise, or maybe someone letting air out of a balloon. I’m thinking this could be a boost leak, but I’ve checked all the IC pipes, and the HKS SSQV pipes and tightened them, so not sure what to do next! Any help would be greatly appreciated!!
linky: