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jpineau
Samba Member
Joined: February 20, 2011
Posts: 11
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 Posted: Tue Jan 24, 2017 6:45 pm Post subject: Re: Vanagon Cruise Control - fix or replace? |
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My pump
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mad.macs
Samba Member
Joined: August 17, 2007
Posts: 230
Location: Woolwich Maine
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| Posted: Sat May 20, 2017 2:12 pm Post subject: Re: Vanagon Cruise Control - fix or replace? |
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I have an '88 I'm rebuilding the cruise on, but it needs a vacuum pump.
Looks like the part number is 701-907-325
There are a variety of Audi and VW pumps available used on eBay. The part numbers all end in 907-325, and they look nearly identical.
The one I'm looking at is 4B0 907 325
They should work right?
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'84 Rivi Vanagon Auto Trans, Stock WBX |
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jpineau
Samba Member
Joined: February 20, 2011
Posts: 11
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| Posted: Sun May 21, 2017 1:08 pm Post subject: Re: Vanagon Cruise Control - fix or replace? |
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They will work. You might have to modify the mount and/or wiring, but it will work.
I am still struggling with mine. Does anyone know where I can send the control unit to get tested / repaired? |
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vwwestyman
Samba Member
Joined: April 24, 2004
Posts: 5688
Location: Manhattan, Kansas, USA
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| Posted: Sun May 21, 2017 8:59 pm Post subject: Re: Vanagon Cruise Control - fix or replace? |
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I'd have to guess that about the only way to test the control unit would be to swap it temporarily into another car with working cruise control.
Otherwise, I think the Bentley procedure is to test each component individually at the plug for the control unit. Then if each one passes, by elimination the only culprit left is the control unit.
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Dave Cook
President, Wild Westerner Club
1978 Champagne Edition Westy, repowered to '97 Jetta TDI
1973 Wild Westerner
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16CVs 
Samba Member
Joined: February 22, 2004
Posts: 4024
Location: Redwood City, California
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| Posted: Sun May 21, 2017 10:28 pm Post subject: Re: Vanagon Cruise Control - fix or replace? |
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I've seen the Speedo pulse wire switched with the brake fluid warning light wire before. Take a look at that.
There is someone on Ebay that rebuilds the ECU's. I have never seen a bad ECU.
I agree with other posters, run the Flow chart in Bentley and if that bellow is bad look around at a bunch of different brands they all use the same bellow.
Stacy
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1987 Syncro Westfalia Triple knob (bastard)
1989 Syncro Tristar Triple knob "Swedish"
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Keep Your van running and upkept tastefully for the love of the hobby.
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AtlasShrugged
Samba Member
Joined: October 30, 2008
Posts: 1605
Location: Decatur, Ga. USA
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| Posted: Mon May 22, 2017 3:17 am Post subject: Re: Vanagon Cruise Control - fix or replace? |
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| vwwestyman wrote: |
I'd have to guess that about the only way to test the control unit would be to swap it temporarily into another car with working cruise control.
Otherwise, I think the Bentley procedure is to test each component individually at the plug for the control unit. Then if each one passes, by elimination the only culprit left is the control unit. |
Here is a test program...with a step for checking the pump too.
When pins 4 and 7 are grounded simultaneously the vacuum servo should operate and open the throttle. If the brake and/or clutch pedals are operated during this test the vacuum servo should release. Hose leaks, leaky vacuum vent valves at the pedals and leaky servos are common reasons to fail this test.
See the linK:http://reflectionsandshadows.com/cruise/ |
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