ok now the line i have cap suck air in the intake really hard. thats if u stand in front of the car looking under the intake infront that i have cap off. on the backside of the intake by the firewall i have the map sensor plug into one line and the other one cap off, its a trickflow intake. when i take off the cap one in front off the car its runs better but the idle stays a little high then comes downs slow i drove like this and it feels faster. what is that line in the front of the intake for and should it be cap