Date: Wed, 7 Apr 2010 11:54:29 -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: 2.1 idling @ 2200, stumbling, etc, where do I start?
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
I would say ecu's can work but not work right.
I seldom find a bad one though.
if it's idling extra fast, I'd unplug the air idle valve on top of the
engine, as a test.
I have seen extreme high idle 'just occur' from that system ...the
electronic idle speed control,
involving that valve and the control unit for it behind the right tail
light.
At least check there for corrosion - where that control unit plugs in,
behind the right tail light.
as a 'general rule' ....one place to start is a very careful 'visual
inspection' ...
of everything you can see - everything that might be cracked, loose,
corroded, stuck, rusty, falling off , frayed ...
etc etc.
I doubt old gasoline is causing your problem, but do consider that the fuel
itself might be old or even contaminated, like with water possibly.
also air leaks....really need to check everywhere for any air leaks.
The large air boot lasts quite well on 2.1's ...but check that .
----- Original Message -----
From: "Raymond Paquette" <raymondpaquette@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, April 07, 2010 11:04 AM
Subject: Re: 2.1 idling @ 2200, stumbling, etc, where do I start?
> Is the ECU something that either works or doesn't? Could the problem be
> in my replacement ECU?
>
> Raymond
>
>
> Raymond Paquette wrote:
>> Hi
>>
>> 1987 Syncro 2.1 sat for 2 years. Ran perfectly (smooth powerful etc)
>> until one day it didn't run at all.
>>
>> Replaced my ECU (with a used one) because the van wouldn't start and
>> everything else checked out (to the best of my limited knowledge).
>>
>> Fired up instantly with the replacement ECU. But now it idles at 2200.
>> At a stoplight it will stay at 2200 and smooth for a bit, then stumble
>> its way down to 1000 and sputtering, then clear up and run right, but
>> at 2200.
>>
>> Some lurching on acceleration, especially at low rpm. When it lurches,
>> the tach drops, and comes back up as the engine comes out of its stumble.
>>
>> FWIW, the old ECU was the D series, the replacement is not. I did get
>> the VW "vanagon syndrome fix" pigtail along with my used ECU. Doesn't
>> make any difference whether it's inline or not.
>>
>> Also FWIW, I have coolant leaks as well, so the system has been
>> emptied and refilled since it last ran well. I have heat, and it runs
>> at the right temp, so I assume that I'm bled well enough. But I offer
>> this in case it is related.
>>
>> Any suggestions about where to start?
>>
>> I bow to the wisdom of the collective.
>>
>> Humbly
>> Raymond
>>
| 
