I was adjusting my idle circuits (holley 750 vs) because after the car is warmed up, then driven, shut down and then refired it doesn't want to idle (espicially in gear). I noticed after the car is hot I only have about 3 lbs of fuel pressure which is really weird because when I first start the car its around 6 to 8. Even if I rev the engine the pressure will not go up? By the way it's a holley mechanical. Any ideas?