i got a 1994 del sol si sohc vtec i need help it has an idleing problem it goes upp t 1500-1700-then it drop to 500-700rpm and does it none stop i thought it was a vaccume leak but i have no leaks then once it is warm on the freeway the check engine light come on also while it is doing that the a/c fan come on when it idles up and shuts off when it goes don so i disconected the fan and it still does it please help it uses a lot of gas
anthony

 

did you try pulling the code to see what it is? That would be a good start. The other thing would be to do a search under "idle problems" and read till your heart's content because there's like a million of these threads on here.