At 09:31 AM 6/25/2015, Steve Williams wrote:
>Hi,
>
>Thanks everyone.  I have a few places to start looking now.  I'll follow
>up if/when I make a final diagnosis.

The cable is adjusted at the throttle end by loosening the screw on
the barrel fitting that engages the throttle arm, and slipping the
cable end through it then retightening.  Bentley says one mm slack.

On the 2.1l the  closed-throttle switch will affect idle, but
probably not to the extent of 1800 rpm.  If the throttle body is worn
out which is likely you may have to set the switch wihle the engine
is running.  Before you try to do that, remove the throttle body and
take the cover off the switch assembly.  Inspect it and then make
sure that the adjusting cam (zinc die casting) is freed up in the
steel mounting plate.  If it's not you will strip the little ?3 mm?
allen socket trying to adjust it.

Check out idle controller module forward of right taillight; unplug,
spray socket with contact cleaner, replug.

That's a start, anyuway.

Yrs,
d

>Have a great weekend!
>
>Cheers,
>Steve W.
>
>On 24/06/2015 12:27 PM, Steve Williams 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