[Njgunslinger]

Ok, weird issue, 2002 camaro SS, stock. Car was running perfect, car sat for a couple weeks, finally take it out today. Starts up fine, drives fine until I get on it, hit 4500-5000RPM range and the car just doesn't want to go, almost likes its choked. And at the same time, I hear a rattling noise coming from the drive side, engine bay area, and the Service engine light starts blinking. I get off it, drive fine at the lower rpm range, doesnt make the rattling noise and the service engine eventually stops blinking and goes away.
Oil pressue is fine, car is not over heating.
I bought some octane booster, filled it up with super, drove it around for a little bit, same thing happening.

Anyone ever experience, have any ideas?

Thanks