idle issue

[Goinsleeper]

When I crank my motor, it revs to about 3k then immediately drops to about 800 where it stumbles for a second and dies. I figured maybe it was the TPS or the water temp sensor but how do i check? My SAFC-2 says 0% throttle with my foot off the peddle and 100% with the peddle to the floor, so i would assume its sets properly. any ideas?
s13 redtop in a 92 240sx.

[Goinsleeper]

Ok, if i unplug my maf, the car will bounce between 2k-2.4k for a while then slowly drop down until it dies. oddly enough the windshield wipers will pop on once, about every other crank, halfway through the rpm drop. that might be because when the rpm's get low, the motor jults alot and it could be setting off the circuit.
does this sound like it could be timing?