Okay well heres the story i just got my car from the shop 2days ago after blowing out my clutch and i have now a brand new JWT Clutch.Flywheel setup on it now. The problem is first my idle is real low and sometimes when i start the car the rpms just drop so low after starting it automatically turns right back off! (happened like 3times...not everytime) and the 2nd problem im seeing is that i hear like a rattling noise coming from the transmission area when i tap the gas a little or even at times when im just in like nuetral not moving ill hear a rattle come from the trans. area!!!! Did my mechanic fu<k up or is this normal bcuz when i called him hje told me the car probably idles low becuz it was unhooked from the battery for about 2-3days and that the rattling noise is coming from the trans. because of the new JWT flywheel and he said it will go away in time! He told me he did the same setup for a G coupe just the week before and mine turned out to be quiter then the other guys... im jus curious if hes right or not!! PLEASE LEMME KNOW GUYS!!!

 

I'm usually pretty paranoid about any type of noise my car makes. Most of the time it's something loose or broken but then again that's just me. I'd get a second opinion from someone here or have a more reputable mechanic look at it.

 

Hmmm...as far as the low idle goes and you're battery disconnected for a couple days, the ecu was reset in a way and maybe they need to do a recal on the idle/throttle position procedure, but don't quote my on that. Bottom line, your idle should not be so low that it stalls...period.

The rattling, idk. Maybe you should post that condition in the appropriate tech section. Other people here have that set up I'm sure.
IMO, never heard of rattles ever getting better. Sounds like something isn't or wasn't done right.

 

the idle wouldnt be affected like that by having the battery unplugged for a couple of days...did he use the right alignment key for the g install...make sure he didnt set it for the z

 

The JWT setup is KNOWN for having a really loud chatter, which is caused by the light flywheel. It will sound like a cement mixer, dont worry, its normal. If you push your clutch in, and the chatter goes away, your fine. If it doesnt go away while the clutch is pushed in, something is wrong. About the idle, I dont know....