I think either the butterfly in the throttle body is sticky or the TPS
(throttle position switch) is out of adjustment

On Wed, Jun 24, 2015 at 11:27 AM, Steve Williams <
steve@williamsitconsulting.com> wrote:

> Hi,
>
> I have a 91 Westfalia, manual.
>
> After driving for a short period of time, when I take my foot off the
> gas, the engine only idles down to about 1800 rpm.
>
> If I "burp" the throttle... by pressing gas pedal towards the floor &
> releasing quickly, the idle will come down to normal.
>
> These symptoms really make me think something physical, rather than
> electrical, vacuum, etc.  However, I've checked the throttle cable &
> what it attaches to and everything seems to be travelling smoothly.
>
> Annoyingly, I can't replicate this without driving the vehicle. Humm...
> as I'm typing this email, I just thought of driving the vehicle, pulling
> over to the side of the road & popping the back open...  but until I get
> a chance to do that, is there any "list wisdom" that could give me
> pointers on where to look?
>
> Additionally, how tight should the throttle cable be?  There is about
> 1/2 inch of slack in the throttle cable.  It is not very clear if it's
> adjustable on the engine end of the cable or not...
>
> Thanks,
> Steve Williams
>