Date: Tue, 10 Aug 2021 08:05:40 -0300
Reply-To: Roy Nicholl <RNicholl@NBNET.NB.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Roy Nicholl <RNicholl@NBNET.NB.CA>
Subject: Re: Idle gremlins still at play
In-Reply-To: <0BB8A3E3-9A11-446D-9245-24F0E7B9EADE@icloud.com>
Content-Type: text/plain; charset=utf-8
Jeff:
My son and I did a test week in Fundy (~400km in total) with the ICV
disconnected. Occasionally, the WBX stalls at idle - mostly when cold,
so as Dan said, put your foot in it a little for a minute and all is
well. The only other time it stalls is when there is a load on the
alternator (running lights on) or the helm is hard over (power steering
pump loaded) at idle ... it does not compensate (I presume the ICU is at
play ... or asleep ... here).
Fuel consumption may be a little higher typical ... but there could be
other bits a play there.
Since driving with the ICV unplugged seems to be tampering the wild
behaviour of the idle control unit, I am going to try waiting until I
put the Hyena into hibernation to send the ICU off for rebuild.
Roy
Jeff Palmer wrote on 2021.07.27 17:57:
> Hi Roy. I have had the same issue - surge then idle then surge - for a couple of years now. When I drive and not moving it idles nicely at 900. Maybe you can wait to send it out until you park it this winter? Assuming you don’t drive it right now. Maybe I’ll send mine with you - I’m in St Andrew’s NB for holiday. (No van).
> Jeff
>
> Sent from my iPhone
>
>> On Jul 27, 2021, at 2:57 PM, Roy Nicholl <RNicholl@nbnet.nb.ca> wrote:
>>
>> 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
>>>
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