Ok guys, i've searched, posted, and re and rediagnosed the problem, but it seems im still wrong. Here's the deal. Im running a 94 swaped d15b7 in my 93 Del Sol S. No after market boltons or anything special. a week or two ago my idle started surging after running for a minute or two, and its been pissing me off. I've semi ruled out a vacuum leak seeing as i replaced some of the 1/4 inch hoses and disconnecting and/or spraying choke cleaners on the others dosnt do anything to the engine while it is running. I cleaned the IACV and the FIV w/ choke cleaner and nothing. Any help? this is really starting to **** me off b/c its eating my gass and i cant play my new subs unless im sitting b/c the reving engine ruins it! HELP PlEASE THis time guyz

 

Silly but check your coolant level, you might also have to bleed your cooling system, sometimes air pockets will accumulate near the highest point in the system ie TB and IAC valve. Just one of those stupid simple things to look for and try

 

How is your timing and O2 sensor? Try moving the idle screw and see if the surge stops.

I surge, REALLY low, but my O2 sensor is fux0r3d.