My accord was having serious idle problems, it would always idle too slow, and stall out half the time. I replaced the IACV myself, and it seems to idle fine, but after the car has been running for a while, when it idles, it seems to idle at the same speed, but the oil pressure light will flicker or come on as it would if its about to stall out (though the idle seems normal) until you rev it back up to speed. if it sits at idle with the oil pressure light on for a while, when i take if off the light will flash on and off until i turn the car off and restart it. am i still having idle problems, or is there a potential oil pressure problem?

 

What is the base idle at? Once warm is the idle steady ~750 rpm's. should be the , mark just below the 1K.

Oil pressure switches are fairly cheap...normally I suggest testing thing but in this case the testing vs the ~$10 part isn't worth it....so I would replace it, while there be sure the wire is secure, clean and tight.