When I TURN ON my Air conditioner, #1, #2 nor #3 doesn't flow air, only #4; what's happening?

this happened only after i changed the distributor. it begins cranking normally then in the middle it will just stop cranking like it has shorted out. if i hold the key there for a second it will continue to start and run fine. i have changed the plugs, wire, starter, ignition switch, stater relay, and honestly at this point i dont know what to do next. it seems to do it on moist, cold or rainy days but not always. i am totally at a loss as what to do next

Replaced head gaskets and timing belt,water pump ,distributor ,plugs and wires

Stopped blowing air so I unplugged the blower motor resistor to go and replace. When I started truck to go get the part the blower worked. Only blows periodically for the last month or so. Has only blown on HIGH for years.

Occasionally, I would turn the key and nothing would happen. I could wiggle the battery cable wires and then it would usually start. Yesterday, something different happened. When I turn the key, the dashboard lights come on for a second and there is a popping sound and the lights go off. Turn the key again and nothing. Disconnect the battery cables and put them back on and get a repeat of lights on for a second and a popping noise. Any suggestions on where I can start? My truck is stranded in someone's driveway.

188000 miles

it does eventually start just takes a few times or starts first try. Sometimes sounds like something is in way of something turning and makes a awful sound almost sounds like when vehicle is running and you try to start it .

The speedometer stopped working altogether so we replaced the VSS (Vehicle Speed Sensor). Now the speedometer readings never hit the real speed, and the speed it shows is constantly fluctuating up and down. What should I be looking at next?

The airbag light started blinking and the horn stopped working.I have checked the fuses and replaced the horn and relay and horn still doesn't work.My repair manual doesn't have a wiring chart that shows the horn.Are they tied in together somehow?

starts and idles fine but then begins to miss fire, you can see the tachometer drop a couple 100 rpms

front brakes were not working so replaced cylinder and bled brakes. front brakes froze up and got very hot. ran diagnostic on it but no code. still do not have front brakes what else can be wrong