Yes? Did underboosted try to use the act in his power? Or did he just accept what they told him and went on his way? What is the issue here? It’s worth a shot. Did I guarantee it would get a free replacement for anyone? No. But it’s worth a shot. That’s all I said. Relax.
Anyway…
Could it be lifter knock/tick? My moms 02 Subaru Legacy and many Subaru’s (even my old 92 Legacy GT) have/had this issue. Lifters were CRAZY loud. Cars ran fine and for a LONG time.
Correct. At least on our cars they do.