2007 SS, no mods that I am aware of, 260k miles. Recently my car has developed an intermittent issue with proper boost pressures. Sometimes it builds pressure just fine, up to about 15lbs and other times it won't build over 5lbs. There seems to be no rhyme nor reason for when it does and doesn't but sometimes if I engage the clutch and rev it a few times, the pressure will come back to normal. A little back story that may or may not be relevant, just before this started, I was hit in the driver side rear tire. This bent the rim and rear axle and the CEL came on. The CEL cleared itself before I was able to scan it and I have replaced the rim and axle. Any thoughts on where to start diagnosing this?