ok i just got a civic but when i turn it on, it turns on normal but a few seconds later the cel comes on and the rpm goes to about 1500 rpm, i checked the the ecu and it gives me a code 3 wich is the map sensor. i checked it just to find out the vacuum lines were disconected. i know one end goes to the tb but i have no idea where the other one goes, can anyone help? and does anyone knoe whats a little cylinder type thing with a green cover next to the map sensor? cause the hose from the map goes into that thing and then into the tb, but i have no idea where the hose that goes into the map is suppose to come from.