Hey guys. Picked up my new ride (05 comp G gtp) last Saturday and so far it has been to the shop twice and they fixed 2 of the issues I was having but not another. Looking for some feedback. The first issue was a gurgling sound from the dash that turned out to be just a bit low on coolant so easy fix. Second was a couple days after I got it the car didn't seem to want to run right at high rpms and blew out some black smoke once while passing a car on the highway. Took it in to a pontiac dealer (the cars GM certified) and they diagnosed it with 4 of the 6 fuel injectors sticking. So they cleaned them per the GM service requirements and sent me on my way. 2 hard pulls later and the engine light is flashing. Took it back and they ended up replacing one of the injectors that apparantly didn't take to the cleaning. Now it runs like a champ . . . but I have another issue. At higher rpms 4k plus there is a rattle? noise that I am hearing. I can't make out where it's coming from. Not sure if its a cat loose or something in the motor? Any thoughts would be appreciated.
