Date: Sat, 20 Sep 2008 00:21:17 -0400
Reply-To: pickle vanagon <greenvanagon@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: pickle vanagon <greenvanagon@GMAIL.COM>
Subject: Re: Van Stalls Easily when totally cold.
In-Reply-To: <009501c91ad6$d6e623e0$6401a8c0@PROSPERITY>
Content-Type: text/plain; charset=ISO-8859-1
On Sat, Sep 20, 2008 at 12:10 AM, Scott Daniel - Turbovans <
scottdaniel@turbovans.com> wrote:
> auxiliary air valve is one suspect.
>
Thanks! I'll try this tomorrow. I seem to remember that these are NLA...
any word on that? And can they be more definitively tested by removing them
and looking down the hole, and applying a voltage directly?
There sure would be a lot of idle stabilzers sold if everyone replaced them
> for just broken plastic mounting tabs.
> it's very 'normal' for them to be broken, but I like having a spare around.
>
Haha, yes. Both my tabs were broke, so I had actually duct-taped the
stabilizer to the side of the compartment. $30 to get duct-tape out of the
engine bay, and maybe even change a bad part, seemed like a good deal to me
;)
Thanks again,
Wes
>
> one test to see if the Aux air valve is supplying any air right after a
> cold start is to pinch off one of the big hoses carrying air that goes
> through that valve, and see if that makes the idle slow down. If no change,
> you can conclude ...........probably ............that the Aux Air Valve is
> not letting extra air in when cold for a faster idle speed.
> it's conveniently mounted so it's a bit hard to get to.
> I think they don't seem to do much, but the way they are supposed to work,
> is that when cold, they are 'open' via a temperature sensitive spring .
> As the engine is running, 12 volts is supplied to a heater element inside
> the valve .............and that causes it to slowly close.......
> so about the time it's fully closed, the engine is warmed up enough to idle
> at normal speed without the extra air that was supplied by the aux air
> valve.
> Always remember to consider and look for intake and air leaks in general.
> They can really mess things up.
> The fuel injection system is very dependent on 'air management' in the
> intake tract, like there can not be any air leaks at all.
> Scott
>
>
> ----- Original Message ----- From: "pickle vanagon" <
> greenvanagon@GMAIL.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Friday, September 19, 2008 6:38 PM
> Subject: Van Stalls Easily when totally cold.
>
>
>
> Lately, our westy has exhibited difficulty maintaining its idle in the
>> first
>> minute or so of cold running. It idles very low during this period, and
>> if
>> you don't nurse it, will cut out. (For example, if you rev the engine,
>> then
>> when it comes back down it will probably die).
>>
>> After 1-2 minutes, everything is perfectly peachy. Gas mileage is still
>> very high.
>>
>> I've tried:
>> swapping out the temp 2 sensor with an extra one
>> setting the warm idle rate to spec (850 rpms) with the adjustment screw
>> with
>> the stabilizer bypassed
>> a new idle stabilizer (needed one anyways because the plastic tabs broke
>> off
>> mine)
>> checking the idle switch (it clicks and functions correctly, at least
>> engine
>> breaking fuel shutoff works)
>>
>> Any suggestions on where to go next?
>>
>> Thanks very much,
>> Wes
>>
>
>
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