11-26-2011, 10:58 PM
I got my 99 Z28 this summer. Shortly after a brief honeymoon period of days on the highway I started noticing a problem. Over the past few weeks the preoblem has gotten significantly worse. Heres what's going on: When I start it up theres a metallic humming for a few seconds then it fades out not to be heard again. Only when I start it. Im not sure if thats related to my biggest quarrel: my 5.7 is wicked bogged down. I feel like im driving my old 92 corolla but the gas pedal doesnt want to go down. As soon as i let off the gas the car jerks and quickly decelerates also there is a loud "bonk" noise. As I continue on the preceeding problems worsen. The jerking happens when I brake and/or let off the gas and gets pretty noticable. The "bonk" noise also worsens into what sounds like a gun shooting through metal. Finally, the exhaust sound sounds less than impressive, its so quiet except for when it "bonks" or "bangs"! This is my dream car so i want it to be a head turner for the right reasons, any knowledgable/accurate advice will be greatly appreciated.