Peter,

Check in the archives under "Vanagon Syndrome". There tons of posts on
this problem. Before you run out and start buying AFM's, harness
patches, idle controllers, ECU, and tantalum resistors, look at the
basic stuff first.

Very frequently, the ECU is fooled into changing your air/fuel ratios
by a leaky exhaust or a vacuum leak. Example would be a leaky exhaust.
The oxygen sensor may read a lean condition when some of the exhaust
gasses are bypassing hte sensor. You can find vacuum leaks by spraying
carb cleaner around the suspect areas while the problem is happening.
It it goes away during a spraying session, look in that area for a
leak.

That is not to say you have none of the typical causes present. It's
just much cheaper to start with the free stuff. Find things like leaks
and broken wires.

BenT

On Wed, 10 Nov 2004 17:11:01 -0800, The Shaws <mindthegap01@comcast.net> wrote:
> Last week my 87 2.1L engine started idling high. I turned off the engine and
> it went away but that tactic is not working any more. The idle is up to
> about 2000. When cold or warm.
>
> What should I check?
>
> thanks in advance.
>
> peter
>

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