Alright ladies and gents, we've got a Trac light that seems to be related to a lean idle condition. When light is on, it can idle at 14.3-14.8(cool with me) OR 18.2-19.7. NOT COOL. But a little bit of throttle under load and she goes right to 12.1-12.4. Fuel pressure @ 40psi. Plugs and wires good. Filters good. Let's solve this puzzle.