2003 wrx boost leak?
Hey guys I just bought a 2003 wrx with 86k miles on it. From my understanding the guy told me he gutted the uppipe. He didn't do the resistor mod so I ended up doing it. No big deal lol. Anyways whenever I'm driving the car semi hard around 4-5+ rpms my boost gauge needle tapers off and then goes back up and does it again. Almost like the turbo isn't keeping boost. I checked my oil and noticed it was low maybe that could be a issue? The guy told me it does that because it doesn't have a car back and only a stock exhaust. I don't know if I believe him. Any advice would be much appreciated. Car is stock besides a 3' turbo inlet