Why Does My Car Have Rough Idle?!?!?!
 

My car has run fine until this point. Last night I raced 2 Supras on the highway to about 140. The car ran beautiful... strong as ever. I then get off of the highway and all of a sudden the car has a hard lope to it at idle... kind of like a cammed out V8 car or something. So I take it home and let it sit overnight. Fire it up this morning and still the same problem. I also noticed after I got off of the highway a slight exhaust leak that was not there before... maybe a gasket between the turbos and DP or between the DP and MP. Could this contribute to the problem in any way? The only other problem that I had today was in third gear when I wrapped it out to 8000rpm and the 2nd turbo NEVER kicked in. WTF?!?! Any ideas? Anything at all would be appreciated. Thanks.

Mine recently has done the same, please keep me posted if you find out something, thanks.

Ohhh By The Way... my car is a 93 R1 w/ full exhaust and pushing about 16psi of boost. The idle is REALLY bad in the morning and on start ups and smooths out just a bit after I drive for a little ways but not much. Still feels very powerful though. Could a fouled plug or something cause this?? Thanks.

if the 93 model has a map sensor,check that the hose didnt come off from it,its known to pop off.Check other vacum hoses as well.

It's not the MAP sensor/hose...cause the car won't run strong, proabably 5 or 6 PSI of boost if the hose popped out.