Ok so I have a 2000 integra gsr with a ls-v swap. I have a type r manifold with a gsr throttle body. Befor it I had a b16 manifold and it ran ok. So anyways when I start the car when its cold it would idle really low like 500 rpm. But when the car warms up it idles at 1500 rpm. And when I close the throttle body the car dies. Any ideas anyone????

 

what ecu are you using?

 

If your fuel filter is clogged it will reduce RPMs. I had to adjust my idle before to ~800 and when I changed my fuel filter it was ~1300.
Just one thought.

 

Right now I'm running a ls ecu. But I used it befor and the idle was fine. As for fuel filterill have to check that