Throttle switch

[al]

Thanks guys, all is well. The switches all passed their continuity test. 
Maybe I did not have complete connection. Oh well, it's still nice to have a 
dependable source for direct answers.

Al
1990 80
-----Original Message----- 
From: Huw Powell
Sent: Tuesday, June 11, 2013 9:28 AM
To: quattro at audifans.com
Subject: Re: Throttle switch

Seconding Cody, test the switches' resistance, not voltage.

Unplug them and connect ohm meter.  Idle should be zero ohms at rest and
infinite (open) if you open the throttle a crack.

WOT switch should be open at rest and close to zero ohms at about 2/3
opened throttle.

- Huw

On 6/10/2013 8:03 PM, Al wrote:
> I have been having problems with the first start of the day. I won’t start 
> on the first try, runs a few seconds and dies. Then it takes a long 
> cranking period before it finally fires, acting like it’s too rich.
>
> I pulled the codes and only got one, 2344 or air leak. Valve cover. I 
> fixed that this weekend and erased the code.
>
> This morning same thing but no codes. Ok, I fixed the air leak.
>
> I took out my Bentley, my home made VW1501 and checked the idle and full 
> throttle switches.
> The idle shows 0 volts when closed and no battery  voltage when I open the 
> throttle.
>
> Full throttle closed shows approximate battery voltage and 0 volts when 
> completely open.
>
> Looks like I need a new throttle switch. I checked the FA and it only 
> shows the upper (full throttle) switch. Part number 026-133-093D. Are the 
> two switches on the cable assembly?
>
> I pulled the codes again and no faults. (4-4-4-4)
>
> Al  Honolulu
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