| Subject: | Re: Idle gremlins still at play |
| From: | Roy Nicholl |
| Date: | Tue, 10 Aug 2021 12:42:01 -0300 |
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. � 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.Â� 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.Â� 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.Â� 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:� >> 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 >> <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)� � 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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