Having trouble with danville 72 vgt hanging vain position at times. I just recently installed and took it to a open house dyno day last weekend. It drives fine on tune 3. But tune 4 and 5 under a load getting a popping noise. I sent mark the logs. The only thing he could see was that it was hanging vain position at times. Turbo has hardly any miles on it. Wondering if anyone has any ideas on what it could be? Also did a compression check last night. Every cylinder was over 300 except driver side rear cylinder was at 260, wondering if it could be a valve train issue. Just not sure how that would cause a turbo issue.