I have an 00 si coupe, and the idle RPM is less than 1000, but yet it pick back up. When i rev/gas it and let it go back to idle, the engine seems like it's about to die, then pick back up to about 500-900 RPM. Any suggestion on how to fix it or what the problem might be? THNAKS!

 

Well, as with all idle problems, check your vacume lines.

Also, search for the IACV, and FITV valve. They both can cause wierd idle problems.