Help troubleshooting

I have an 04 Gt and havent had any issues the last month and a half ive owned it the last 2 weeks randomly when i start it it will try and try to turn over then just wont so i will try again and most of the time it will start fine. But sometimes it will start and idle weak and die a few seconds later.....any ideas?


Also it has a bassani exhaust and between 1600-2500rpms its really raspy and sounds like somethings vibrating is that just the sound bassanis have or could something be loose and vibrating. Thanks for all the help!
 
My 03 had the start issue. It would NEVER start the first time I turned the key regardless how long I held it. If I did it for 1 second, the did it a second time....it started every time. I guess I was just so used to it, it never bothered me.

I think the Bassani is a little raspy sounding with an o/r pipe. If I remember right, they drone BAD while cruising at mid RPMs. I got tired of the drone and went to a new exhaust setup. I am interested to see how my new setup sounds.