I have a 2000 3.8, stick. Sometimes it idles fine @ 800 rpm. Sometimes it idles @ 1500 & then after about 6-10 seconds idle slowly drops down to 600, misses & sometimes will die & other times will idle back up to 800 & be fine. Any ideas on where to start?
Have sprayed every vaccum hose & connection with starting fluid with the engine running & no change in idle speed. Traced the evap (green cap) all the way back to the fuel tank & found nothing. What is the best course of action at this point? Thanks, gts