I was driving my '95 GSR yesterday and noticed a HUGE loss in power when trying to accelerate. The car would shake and stutter before eventually 'kicking in'. The exhaust also made a "poof-poof POOF" sound while idling. It just has a clogged sound.

I'm taking it to a mechanic tomorrow, but i was hoping that somebody could give me a heads up on what was possibly wrong. Also while waiting at a stop light, the car idled at about 400 RPM's. This stuff just happened all of the sudden too.