Hello. I've got a 84 Chevy Celebrity which was sitting since 2011 in a barn. The people that had it before werent too much into cars and i guess didnt really maintain it that well (Loose or ripped off vacuum hoses etc)
Anyways, since it likes to stall at idle when its cold, i was checking and replacing vacuum hoses, as i noticed that the Map sensor was missing its hose... but then i noticed, theres a second map sensor? Like, right next to each other? This one had its hose connected though.
I am very confused of what i am seeing there. Are both really map sensors? Why two? And does that one sensor need to be connected to vacuum or is it something else that messures the outside air pressure? I am just so confused and hope that someone can help me witth this