Stuart:

That's interesting.�  Though being dead-in-the-water for a couple of
weeks or more (I am in Canada) is discouraging.

Thank-you,

Roy

stuartmacm@gmail.com wrote on 2021.07.27 14:40:
> Idle control unit.  Have it rebuilt:  https://modulemaster.com/products/vw-volkswagen-vanagon-1986-1991-idle-controller-rebuild  After 30+ years in a wet environment they all fail.
>
> Stuart
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Roy Nicholl
> Sent: Tuesday, July 27, 2021 10:25 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Idle gremlins still at play
>
> Good day all,
>
> The Hyena (88 Westy WBX)   started racing at idle (from 1100 climbing to
> 2500 last summer).   If you were at the back of the van and pushed the throttle hard closed - sometimes wiggling it - the van would fall back into an idle.     With the engine shutdown, you had to do the same to hear the click of the TPS.
>
> This morning, I replaced the throttle body with a new GoWesty unit.  Things were fine for the first test run.   After lunch, I restarted the van and it began surging at idle, but differently than before.   The WBX will surge to 2200 - 2500 RPM, but after 1-2 seconds falls back to idle.   Rinse and repeat.
>
> I unplugged the 12v from the idle control valve and the engine remained at idle.     I removed the idle control valve; cleaned it with carb cleaner and tested it with 12v leads (valve appears to move).   I re-installed the valve and the same thing happens.
>
> So, is it possible the spring is too weak and the valve is bad ... or is my problem likely to be elsewhere (i.e. idle control unit) and more expensive?
>
> What's the impact of running with the power to the idle control valve disconnected while I await a new one?
>
> Roy
>