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Idle Issues
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1981Sedona
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Joined: December 24, 2018
Posts: 5
Location: British Columbia
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PostPosted: Thu Nov 19, 2020 9:42 am    Post subject: Idle Issues Reply with quote

I have an Ď81 air cooled vanagon. On my last trip, I experienced idle issues where it would stall at idle. It also stalled occasionally while downshifting into second at low speeds. The problem started out of nowhere and she was running fine prior to the trip. I recently replaced my exhaust and am wondering if the increased back pressure may be causing an issue?

I am trying to get a better idea of how the air intake works, and which vacuum lines to check. Is anybody able to explain to me? I have posted a photo of my engine with a few markups. I am curious as to the function of the hoses marked 1. and 3. Iím also wondering what the use of the component marked 2. is. Is it a pressure regulator? If anyone can answer these and give me a general rundown on the intake that would be great!

I appreciate your help!
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MarkWard
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Joined: February 09, 2005
Posts: 14163
Location: Palm Beach County, Florida
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PostPosted: Thu Nov 19, 2020 9:55 am    Post subject: Re: Idle Issues Reply with quote

1, is the vacuum line for the brake booster up front.
2, is the deceleration valve.
3, Air Flow Sensor.
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1982 Vanagon Camper with ALH TDI.
1990 Vanagon Camper Syncro.
In Car https://youtu.be/5hbfdUJR88Q
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oceanair
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Joined: June 09, 2013
Posts: 634
Location: Victoria, BC
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PostPosted: Thu Nov 19, 2020 10:58 am    Post subject: Re: Idle Issues Reply with quote

#2 has a big kink in it where the hose is black -- that needs to be remedied! Unkink!
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84 Vanagon Tin Top, 1970 Ghia - 2014 Jetta Wagon TDI -- all sweet rides! Love em!
Previous: Green 72 Tin Top, White 72 Westy, Blue 64 Beetle, Yellow 71 Squareback - wish I could have them all back!
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oceanair
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Joined: June 09, 2013
Posts: 634
Location: Victoria, BC
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PostPosted: Thu Nov 19, 2020 10:59 am    Post subject: Re: Idle Issues Reply with quote

#3 is the hose that goes to the carbon canister -- 99% sure.
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84 Vanagon Tin Top, 1970 Ghia - 2014 Jetta Wagon TDI -- all sweet rides! Love em!
Previous: Green 72 Tin Top, White 72 Westy, Blue 64 Beetle, Yellow 71 Squareback - wish I could have them all back!
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