I would check the IAC (also known as the ISC or Idle Speed Controller) first. There's a recent thread about this, and the Factory Service Manual gives the procedure to check the coils with a VOM. The flickering lights are most likely due to the alternator not putting out a steady voltage due to your low idle rpms.

That's where I'd start. I'm sure others with much more knowledge than me will chime in. Let us know how you get on! <img src="/forums/images/graemlins/kewl.gif" alt="" />

Eric W.

'89 Dodge Raider -- 3.0L V6, MT, SWB