My friend has a 1986 Volvo 240 with about 250,000 miles on it. I cleaned the throttle body on it today, after which it idled really funny and scared me that I had screwed something up. Apparently the problem stopped, so that's all good now... But anyways, right before the throttle body on the hose there are two ports with tubes going out of them. One of them is hooked up to something, the other has nothing on the end of it . Is this normal? It seems like this would suck unfiltered air into the engine?

One other odd thing is the car appears to not have AC, even though the switches are all there and it blows air. Does anyone know if it's possible this car didn't come with AC? It has an old Volvo dealer emblem on it from North Carolina.

And the biggest issue at the moment is the tailights. Only the drivers side tailights work. All the bulbs are good. I haven't personally replaced the fuses, but the mechanic she had try and fix it said that when you replace one fuse the other blows out. Does anyone know if this is a common problem with them? The connectors going into each side of the tailight look slightly different. One side has two wires grounded to the frame, and the other only has one.

Any help with any of these issues would be greatly appreciated.