I vote for the TPS.  I had the same issue.  I picked up another Throttle
Position Switch, cleaned out the throttle body, installed the new-to-me TPS
and the bogging issue was resolved.

Jim
Wilmington, NC

On Tue, Dec 1, 2009 at 7:25 PM, Scott Daniel - Turbovans <
scottdaniel@turbovans.com> wrote:

> throttle switch.
> I'm finding *many* vanagon throttle switches not making contact at idle.
> I'm finding the later type switches ( where it's one switch mounted under
> the throttle body , which is late 85 1.9's and all 2.1's ) ........that
> they
> are hard to get to an adjustment, or to 'reach' a spot with proper switch
> function - like I'm at the limit of the adjustment range on one end.
>
> I'm also finding them corroded, stripped, and impossible to adjust.
> That the ECU knows the engine is at idle, is *very* important.
> Suggest you check that carefully.
>
> Scott
> www.turbovans.com
>
>
> ----- Original Message -----
> From: "James V" <tornadored@GMAIL.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Tuesday, December 01, 2009 3:49 PM
> Subject: Re: cold start skipping
>
>
> On Tue, Dec 1, 2009 at 1:47 PM, Dave Lindemann <d_g_lindemann@yahoo.com>
> wrote:
>
>> The van is great but it takes a few minutes to warm up.  It starts right
>> up, but there is an engine skip when it first starts up.  If I let it run
>> for 3 or 4 minutes, the skip goes away and off I go.  If I try to drive
>> with the skip, it is very difficult not to stall and the van bucks with
>> extremes of stopping and going.
>>
>
> Having a similar problem w/ my 86 Syncro, even after new Temp 2 sensor
> and O2 Sensor.  Pugs/wire/cap/rotor also new.  Going to clean grounds
> next, then dive into the AFM.  But I'm interested in any continued
> advice to feed the back of my little brain.
>
> Thanks,
>
> James V
> 86 Syncro Westy
>