when i first turn on my car say in the morning before school, after its been sitting all night, ill crank it up, itll drop rpm to about like 400-600 rpm and sputter, sometimes itll cach back up and go to normal ( 1000 ) or sometimes it will shut off, and ill just crank it up again and itll run fine when it warms up, ne one know whats going on ? my friend said it could b a stuck injector but iuno to much about fuel tunning

cat under the hood???

they always run rough when cold from my experience. mine does that too, drops down just a bit acts like it is about to die then jumps back up. it rarely does it and has never completely shut off tho so i dunno.

There's a number of sensors that "could" be staring to go on you... for hot/cold problems I would start with coolant temp sensor. IAC could be acting up as well...



15.9 @ 86.7mph

Smooth idle? We don't need no stinking smooth idle.

Mods List:
http://highlander.dsmpower.com/sig.htm

take off your intake pipe to your intake (whether u have CAI or intercooler pipes) get some carb/choke cleaner and spray it into and on the butterfly plate in the intake. make sure u get that little hole in the TB that goes to the IAC. just do a basic tb service, it takes 5 mins and you will idle stronger. on another note, the 420a (as with most engines) runs rich at startup to get the engine up to operating temperatures quicker.
_________
96 talon esi-t
san clemente, ca

Change your sprakplugs too.

1999 Black C5
1997 Silver RS
Wiseco 8.8:1 Pistons(back to low compression!)
Eagle Rods
T3/T4 Turbo
Custom FMIC
Greddy Exhaust
440's
Most current 1/8th mile time: 8.3@90mph 2.015 60'(Nitto Drag radials, i suck)

Mine does this too, but it also does it if I go into somewhere for an hour or so and come back out, sometimes it doesn't do it at all. It's very strange, plugs are new, and I just replaced one of the problems that I thought was causing it, now I'm wondering what else it could be.

yea what turbo8u said. Clean your TB that should take care of it.