Hello, New to the site and a heads up if I seem mildly helpless but Im gonna do my best to explain Everything.
I drive a 2002 bug eyed wrx. The first owner had to replace the oil pick up, and as he describes, he replaced the engine with 05' sti engine and added a boost gauge. I also have an aftermarket exhaust system. Anyway those are pretty much the best detais on the specs I can give
The car has driven fine for a year now but the other day, on the highway I originally noticed a low shhhhhh noise coming from my engine combined with occational jerking with a loud, short sucking noise. I couldn't record the noise since my engine is too loud and it was very subtle at first. So naturally I suspected a boost leak and checked under my hood for anything blatantly loose. Noticed my top mounted Intercool had a loose nut. I tightened it down good and took it for a test drive.
The noise isn't present until I get past 3rd gear, then it becomes present in every gear upon acceleration. During this time the wooshing noise has gotten much louder and I have no boost power. However the jerking and loud, short noise had stopped. Anyway I don't know much but I'm mechanically inclined, I have tools and Id like to try to fix Myself.
Is there anything I can do before a smoke test? Assuming I'm accurate in chalking it up to a boost leak