The rpms on my 92 VX Rise to 1000 when I’m Idling if the Headlights are on. I hope that’s a neat clue for someone out there. I haven’t found this symptom anywhere. I have the shop manual. My mpgs aren’t what they should be (low40’s). I drive 50-60 on the flat. I’m at 0’ - 100’ elevation. Northern Pacific coast, Humboldt County, California I coast like she’s a roller skate. I keep the rpms at or under 2000 unless accelerating.
I lost :( a reference that said to set the base idle with the lights ON. I think.