Racer X

cold idle is very bad it wil crank then run fine for about 2 seconds the sputter and die unless i give gas and hold it above 1000 rpm when it warms up it will not cut off but when i come of the gas at a red light it will idle low then jump back to 950 rpm no problem every stop thou !!!!when i hit boost it also sometimes cut out at 100 mph like i have a rev limiter but im in 5th sort of like someone cuts the fuel off i know my turbo is on it last leg because the in the air flow passage but the bad idle is new still boost okay not as hard as when i first got it thou it only goes past the 1 on the dash and stops at a little ways shy of the half way to 2. what could it be fellas ? also bad vibration when i go over 3000 rpm from transmission sometimes it okay and drives smooth but most of the time its rough take it out of gear no problems even rev motor no vibration but as soon as i put back in gear past 3000 rpm vibrations? mmmmm what could that be fellas???? <img src="graemlins/c.gif" border="0" alt="[ouch]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" />