Date: Tue, 10 Aug 2021 12:42:01 -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: <CAFdLW6=Trr4Aa1T3Ai=MvdjpiY-K0kYs=C+xtaO7EySOD1zEXA@mail.gmail.com>
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Dan:
Out east here (Maritimes), I typically run Luqi Moly 5w40 in the WBX as
well. When we make a long-haul summer trip - west (across the Prairies)
or south (into the U.S.A.), I'll use the 50 weight.
Â
Dan N wrote on 2021.08.10 12:32:
> For the WBX engine the only thing I worry about is the thickness of
> the 20W50 oil... so go easy with the gas pedal at cold startup... I
> just blip the throttle to keep it running. The ML430 uses 5W40
> synthetic oil.
>
> On Tue, Aug 10, 2021 at 8:02 AM Roy Nicholl <RNicholl@nbnet.nb.ca
> <mailto:RNicholl@nbnet.nb.ca>> wrote:
>
> Dan:
>
> That's the manner in which most of our diesels operate.
>
>
> Dan N wrote on 2021.08.10 11:59:
>> The idea of giving a little gas when you start a cold WBX engine
>> (without dle controller) was from my observations on my ML430
>> SUV. When I start it cold the idle speeds up to about 1500 rpm
>> for a couple seconds then going down gradually to 1200, 1000, 800
>> and and stops at 550 rpm all in a lapse of about 30 to 45
>> seconds. I asked my mechanic about it and he said /"Mercedes has
>> not used an idle control valve since around 1990. The idle is
>> controlled by the throttle valve actuator and timing via a
>> sensor... If you start your cold engine and it idles right away
>> at 550 it will stall and die and something is wrong with the
>> sensor.//"/
>> /
>> /
>> dan
>>
>> On Tue, Aug 10, 2021 at 4:06 AM Roy Nicholl <RNicholl@nbnet.nb.ca
>> <mailto:RNicholl@nbnet.nb.ca>> wrote:
>>
>> 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 <mailto: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 <mailto:stuartmacm@gmail.com> wrote
>> on 2021.07.27 14:40:
>> >>> Idle control unit. Have it rebuilt:Â
>> https://modulemaster.com/products/vw-volkswagen-vanagon-1986-1991-idle-controller-rebuildÂ
>> After 30+ years in a wet environment they all fail.
>> >>>
>> >>> Stuart
>> >>>
>> >>> -----Original Message-----
>> >>> From: Vanagon Mailing List <vanagon@gerry.vanagon.com
>> <mailto:vanagon@gerry.vanagon.com>> On Behalf Of Roy Nicholl
>> >>> Sent: Tuesday, July 27, 2021 10:25 AM
>> >>> To: vanagon@GERRY.VANAGON.COM
>> <mailto:vanagon@GERRY.VANAGON.COM>
>> >>> Subject: Idle gremlins still at play
>> >>>
>> >>> Good day all,
>> >>>
>> >>> The Hyena (88 Westy WBX)Â Â 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.Â
>> Â 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.Â
>> Â 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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