Don't know if I spelled it right.
My headlights and all my interior lights sometimes flicker.

 

I had the same problem w/my 89 formula--only the headlights would flicker--turned out to be a loose chassis ground. might want to check all your grounds for tightness--also make sure they're clean--to bare metal.
Also--not sure of other engine sizes--but there's a ground strap on the pass side head of the tpi motors near the firewall--see if you have that ground, and if so--make sure it's tight.

 

hey, that ground wire you were talking about is this it? (wire is really flat and skinny?) also you have any idea what the metal bracket on the fire wall that has nothing to it is? thanks man. i also have the flickering prob. and i am trying to find a remedy... thanks.

 

That's the engine ground strap, that may not be the cause of the flickering but might as well clean up the connection and upgrade that cable if you have 10 minutes to kill. There should be a ground connection through your battery terminal to sheet metal right in the area. Upgrade that connection as well. Then clean your terminals and tighten them then try again.