Map Sensor

I Have a 91 Integra LS and it consantly Idels 900 to 1900 and down again it's really anoying I need to now what are the causes of this. I was told the Map sensor and that cost $250.00 Can any one HELP me Please befor i go and spend all that cash when it might not even be my problem :banghead:

map, tps, iacv, vac leaks.

try those first.

why dont you try your idle air control. it should be underneath your throttle body