Date: Thu, 10 Feb 2005 09:48:39 -0800
Reply-To: "Matthew C. Huntley" <matthew.huntley@STRATHBOGIE.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "Matthew C. Huntley" <matthew.huntley@STRATHBOGIE.NET>
Subject: Re: extreme idle from hell results...air flow meter!
In-Reply-To: <679A4AB1-7B6F-11D9-85CD-000393BF0DFC@cox.net>
Content-Type: text/plain; charset="us-ascii"
Hi Adam,
I am troubleshooting a similar problem, only when it is cold
kinda thing.
What I am wondering is how is you clean/align the tracks of the AFM?
Thanks,
Matt
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Adam Behle
Sent: Thursday, February 10, 2005 6:24 AM
To: vanagon@GERRY.VANAGON.COM
Subject: extreme idle from hell results...air flow meter!
So after dealing with my evil idle problem (see below) for over a week,
I gave up a took it to my trusty mechanic. After checking the fuel
delivery, he swapped the ECU, and finally the air flow meter which he
determined to be bad. This was after I had found it to be within spec
(so much for my diagnosis). I took my van home to try to clean or
re-align the "tracks" of the air flow meter as a last ditch effort, and
it worked! I don't know how long it will last, but it beats spending
$500 on a new AFM, and I learned a lot about troubleshooting the fuel
injection system. Hope this helps someone out there. Thanks for the help
everybody, Adam
"I have tried to diagnose it for the past week and have had no success.
Upon starting, it feels like it is running on 3 cylinders and stalls
repeatedly. Once it is warmed up by careful manipulation of the gas
pedal for about 5-10 minutes, all is well-great power, throttle
response, 17 mpg. Exhaust smells a bit rich, but it has for quite some
time.
This is what I have done so far:
Replaced air filter, fuel filter, oil, oil filter, and spark plugs.
Found and replaced 2 broken vacuum lines. Checked throttle switch per
Bentley and found it to be ok. I have a nicely humming idle control
valve which was cleaned anyway. Swapped out the idle stabilizer control
unit with a friends' and got no change in behavior. Replaced temp 2
sensor. Cleaned grounds on left head to firewall. All this has resulted
in no change of cold idle stalling/bucking behavior.
The oxygen sensor doesn't participate in the cold idle loop anyway, so
that is probably not to blame-right? It was replaced about 40K miles
ago. My air flow sensor had the "capacitor fix" when I was hunting down
Vanagon syndrome a few years back. Turned out to be the ECU, which was
replaced. "
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