First, I've probably read every thread on the internet related to boost surging and the boost control solenoid. Second, I'm new to more "advanced" car tinkering and I have only had my Subaru for about 2 weeks.
I am having consistent boost surge in gears 3,4,5. The turbo will pull hard, let off, pull hard, let off. This happens from about 3500rpm to whenever I decide to shift or slow the hell down.
I have NO mods. I have NO boost gauge.
The previous owner swears it has to do with the BCS, so today I cleaned it out with MAF cleaner. While in there I noticed that the line coming out of the BCS and into the T fitting had a few cracks at the junction between it and the T fitting. I will attach pictures of that. So, I reinstalled the BCS and put some ****ty (but should have been airtight) tape around the cracks on the vacuum line (if that is the correct term). Needless to say, after taking the car out I didn't notice any improvement in the problem.
So, I had someone turn my key while I listened for the BCS to click. I'm not sure if I was supposed to listen when the key was being turned to accessory mode or when the car was actually turning over. When turned to accessory mode I heard a click close by, but I don't think it was from the BCS. When the car was turned over it was too gd loud to notice a small click from a small part - at least it was for me.
My plan is to buy a used BCS and swap it in the see if that fixes the problem.
Would an admittedly ****ty tape job over the vacuum line be enough to prevent leakage at such high pressure? I will replace the line asap, but I didn't have the time tonight.
After cleaning the BCS and taping the line should I have reset my ECU, or would it have automatically adjusted for the new found airflow?
I checked all the lines into and around the BCS and immediate area visually and did not notice any issues. I'm going to do this again tomorrow, but I'm not sure exactly which lines should be checked. Assuming all of them..
Is buying a used BCS ($30, no problem) a good place to start?