1973 Campmobile

Donegood · Posted: Sun Feb 12, 2012 7:11 pm Post subject: 1973 Campmobile

I just got a 1973 VW Campmobile with an automatic transmission. When in park if I step on the brake the idle drops to almost a stall and struggles to recover and then back down to almost stalling again. But when I lift off of the brake the idle returns to normal. Would this have anything to do with it being an automatic and its vacuum hoses? Vacuum advance on the distributer? Maybe electrical? If anyone has experienced this before I could use the help.
Thanks! Donegood

crushie · Posted: Sun Feb 12, 2012 7:17 pm Post subject:

What is the idle rpm in park? Is it at spec?

Donegood · Posted: Sun Feb 12, 2012 10:47 pm Post subject: 1973 campmobile

I dont have a tach I just go off of sound but it happens at what ever idle I set it on. Only when I step on the brakes does the idle go down and want to stall.

Desertbusman · Posted: Sun Feb 12, 2012 10:59 pm Post subject:

Your brake booster is shot! Time to have it rebuilt.
_________________
The best thing that anyone can do for their Bay is get the Volkswagen of America Official Service Manual published by Robert Bentley. Without it the bus is pretty much doomed.

Kirk · Posted: Mon Feb 13, 2012 6:07 am Post subject:

Donegood · Posted: Mon Feb 13, 2012 8:50 pm Post subject:

It was the brake booster air connector is broken. I'll never find one of those. I'll have to make my own. Any Idea's?

Wildthings · Samba Member Joined: March 13, 2005 Posts: 19960

What is an air connector? A better description or a picture would help.

busdaddy · Posted: Tue Feb 14, 2012 7:42 am Post subject:

Donegood · Posted: Tue Feb 14, 2012 1:51 pm Post subject: 1973 Campmobile

I am trying to figure out how to post photo's but I did get one on my photo's.[img]http://www.thesamba.com/vw/forum/album_search.php?search_author=Donegood
[/img]

busdaddy · Posted: Tue Feb 14, 2012 1:55 pm Post subject:

Image may have been reduced in size. Click image to view fullscreen.

Even at full magnification I can't make it out, is that in the line beside the transmission by any chance?
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Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

Donegood · Posted: Wed Feb 15, 2012 10:29 am Post subject: 1973 Campmobile

How did you put the picture in the reply? anyways I took a picture of the brake booster and I would like to find the little piece that the pushrod goes through but I dont want to buy a new brake booster if mine is working ok.

Kirk · Posted: Wed Feb 15, 2012 10:34 am Post subject:

If you can provide a better picture, we can tell you if someone has it or knows where to get the part.
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Oppenhiem
Bear
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busdaddy · Posted: Wed Feb 15, 2012 11:03 am Post subject:

Is that the fitting on the accordian boot on the front of the brake booster? Not too hard to find used or even manufacture from tubing and JB weld if necessary if it is the atmosphere connection.

To post the photo copy the forum address that shows above it when you open the picture. (it begins and ends with img)
_________________
Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

Desertbusman · Posted: Wed Feb 15, 2012 11:33 am Post subject:

If it was just the plastic vent hose connection that wouldn't cause his problems, would it? But if that valve affair is busted up it is a problem.
_________________
The best thing that anyone can do for their Bay is get the Volkswagen of America Official Service Manual published by Robert Bentley. Without it the bus is pretty much doomed.

busdaddy · Posted: Wed Feb 15, 2012 1:28 pm Post subject:

No, by itself it wouldn't, but if it was broken for years and allowed the booster to ingest all sorts of water and crap it could be blamed for it in a roundabout way.
_________________
Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

Donegood · Posted: Wed Feb 15, 2012 1:41 pm Post subject:

ok that cant be it. I followed the hose to a side panel and it just ends everything else on the brake booster looks ok but it still wants to stall when I step on the brake.

busdaddy · Posted: Wed Feb 15, 2012 1:44 pm Post subject:

The next step is disconnect the hose to the booster at the front of the engine (cap off the port on the balance tube) and see if it still quits when you step on the brake. Caution!: no power brakes during this test, braking will require more effort!
_________________
Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

Donegood · Posted: Sat Feb 18, 2012 9:43 am Post subject:

Got it! Thanks for the help everyone!

Amskeptic · Posted: Sat Feb 18, 2012 9:50 am Post subject:

greenbus pilot · Posted: Sat Feb 18, 2012 10:02 pm Post subject:

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