Date: Fri, 19 Sep 2008 21:30:57 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Van Stalls Easily when totally cold.
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those valves seems to pass some air anyway to me,
but you could test one out of the car by cooling it in the fridge say ........and seeing if you can blow through it nicely, then see if it closes down with power applied after a few minutes.
I suspect that most of them only sort of work. But that device is supposed to make the idle faster when cold, and other than the temp sensor it's about the only thing that makes the idle faster when cold - it's for sure the only air-related cold idle device, put it that way.
Scott
----- Original Message -----
From: pickle vanagon
To: Scott Daniel - Turbovans
Cc: vanagon@gerry.vanagon.com
Sent: Friday, September 19, 2008 9:21 PM
Subject: Re: Van Stalls Easily when totally cold.
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
