So lately I've noticed the car started to drop rpms rapidly between shifts. I mean under normal driving conditions (at a normal shifting speed) as soon as I put the clutch in the rpms drop off exceptionally fast (like if I just shut the car off) normally they hang a second or two but now they drop almost instantly. Any idea of what this could be? I found that the coupler holding the air filter to my RAI had a tear in it (ordered a new coupler and will have it tomorrow) but not sure if that's a possible culperate? Any ideas? Maybe a vss sensor?