93 LS400, 198K.
I was having some intermittent iding issues a couple of years back, but never like this. While standing at a light the car will sit between 500-750, then dip to 250 for a second, then back up to normal. It will do this 2-3 times in about 25 seconds then die. It does not happen at every light, but often enough that I thought I would see what this forums would say.
Gas?
Idle control?
Something else?
Any help wouldbe greatly aprreciated.
DuaneG