Odd air/fuel mixture screws
I have the newest version of the holley 390 4bbl. When I screw the idle circuits in to like have a turn out from seated I start to smell a strong gas smell. I thought screwing the circuits in would lean it up. Do these circuits meter fuel or air? Also after completing the team rush my jeep idles best at like over 20degrees advanced, and doesn't run so well when I start to retard it from around 20 degrees. What does this mean. I haven't got it out on the road yet, but just revving the engine it feels more powerful than before team rush. I am anxious to get out on the road, but thought i needed to get timing and the idles circuits right.
Thanks in advance for your help!!