84 Vacuum problem
Thread Starter
Pro
Joined: Apr 2003
Posts: 634
Likes: 0
84 Vacuum problem
Whenever the heat or air conditionining is on in my '84 vette, the air flow comes out of all holes. The heat works, and the Air works, but I can't switch between the floor, vent or defroster--comes out in all 3 places.
Are there common problems when it comes to this? I've already replaced the vacuum thingy that the hoses contraption behind the dash slide switches plugs into--that black plastic thing that turns by vacuum is what I replaced. The little prong/tip is in the track and everything, but the air flow still comes out of all holes. When I move the slide directional switch, the vacuum actually turns the thing. I replaced the black thing that the hoses plug into just in case--the old one worked (the wheel turned when I moved the slide switch) just like the new one works.
What's up with that?
*My cruise works whenever it wants to and I have a hesitation/cough sometimes when I step on the gas as I'm going a steady speed around town. To me this indicates a vacuum problem. Yea--I'm a brainiac.
Help! :banghead:
Are there common problems when it comes to this? I've already replaced the vacuum thingy that the hoses contraption behind the dash slide switches plugs into--that black plastic thing that turns by vacuum is what I replaced. The little prong/tip is in the track and everything, but the air flow still comes out of all holes. When I move the slide directional switch, the vacuum actually turns the thing. I replaced the black thing that the hoses plug into just in case--the old one worked (the wheel turned when I moved the slide switch) just like the new one works.
What's up with that?
*My cruise works whenever it wants to and I have a hesitation/cough sometimes when I step on the gas as I'm going a steady speed around town. To me this indicates a vacuum problem. Yea--I'm a brainiac.
Help! :banghead:
Melting Slicks
Joined: Jan 2003
Posts: 2,167
Likes: 0
From: What did the 5 fingers say to the face? SLAP!!
Re: 84 Vacuum problem (84 Cross Fire)
If it's not the thing, it could be the thing. Or maybe even the thing. I've got the same problem on my '86, and it's a broken vacuum line running from behind the distributor to the vacuum check valve near the firewall. It's hard to get to and I'm lazy. Bad combination.
Pro
Joined: Apr 2002
Posts: 584
Likes: 0
From: Baldwinsville NY
Re: 84 Vacuum problem (84 Cross Fire)
Haven't had that rpoblem yet...did I say YET? I do get a hesitation when I switch from vents to defrost, etc as if the vacuum is trying hard to make the switch, but it does work after about 5 seconds.
