Date: Thu, 24 Nov 2011 14:53:45 -0800
Reply-To: Old Volks Home <oldvolkshome@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Old Volks Home <oldvolkshome@GMAIL.COM>
Subject: Re: Need instructions on field R&R of AFM '84 1.9L Van down
In-Reply-To: <CAGXJJtx1EkTY7zYYTmPi-m_fyuugJ3-RKzb-8L2kKteP98jrNQ@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Steve -
I've gotta agree with Dennis on this one. Digijet (83.5-85) and the
earlier L-Jet (80-83.5 Calif) 1 wire O2 systems are disabled at
Startup. In otherwords, they start with the ECU in "Open Loop" Mode
for the first 2 or 3 minutes to maximize fuel delivery performance
during warm-up. If it started in "Closed Loop" Mode, it would would
run too lean, thus hard to stay running. When you turn the ignition
off and then restart the ECU always re-sets itself for "Open Loop"
mode, even with the engine already warm, but for perhaps a shorter
duration because of the inter-action with the Temp Sensor reading
going to the ECU. At least that's been my understanding and
experience with these.
Now with Digifant such as your 91, this may be different, but my
experience is with earlier FI ECUs.
Just my nickel's worth.
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
72 411 Station Wagon "Pug"
75 914 1.8 "Nancy"
Full Timing Since March 1999
oldvolkshome@gmail.com
http://www.oldvolkshome.com
Find me on Facebook:
http://www.facebook.com/people/Jim-Thompson/100000710343835
***********************************
On Thu, Nov 24, 2011 at 12:50 PM, Steven Johnson <sjohnso2000@gmail.com> wrote:
> Really? I'm sorry Dennis but I have to humbly disagree. I've had these
> symptoms while
> hard cold starting in Arizona and had the O2 sensor replaced and no more
> cold start problems....
>
> So Dennis, explain yourself sir.....
>
> Respectfully,
>
> Steven
> 91 Westy....
>
> On Thu, Nov 24, 2011 at 10:31 AM, Dennis Haynes <d23haynes57@hotmail.com>wrote:
>
>> O2 sensor has absolutely no effect on cold or even hot starting.
>>
>> Dennis
>>
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
>> Steven Johnson
>> Sent: Thursday, November 24, 2011 12:58 PM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Re: Need instructions on field R&R of AFM '84 1.9L Van down
>>
>> Sounds like either a bad oxygen sensor or a bad temp sensor. The cold
>> starting difficulty is a pretty obvious symptom for these two items.
>>
>> Steven
>> 91 Westy
>>
>>
>>
>> On Thu, Nov 24, 2011 at 9:36 AM, Tom Torrella <ttorrella4@comcast.net
>> >wrote:
>>
>> > Happy Thanksgiving Y'all!
>> >
>> >
>> > i have an 83 Westie, 1.9L water-cooled with about 6k miles after rebuild.
>> > It would run rough, stutter & lose power. Just had a similar problem
>> > last week running north on I-95 to MisThanksgivings in Awendaw, SC,
>> > pulled into gas station as it totally stalled @ a fuel pump. After
>> > several unsuccessful attempts to restart after filling up (10gal) we
>> pushed off to the side.
>> > Motor cranks just no firing, no idling. While waiting over an hour for
>> > helpful calls I decided to change the fuel filter. VAROOM! Started
>> > right up! Took several stops to find another filter. (keep one in
>> > case & fuel
>> > pump)
>> >
>> > Now, my new problem - hard cold starts. Starts, idles, stalls. Any
>> > attempts to press accelerator floods, misfires, stalls. The colder
>> > weather the worse the issue. After several minutes it warms up and
>> > runs fine. Looks like all vacuum lines are attached, no leaks heard,
>> > any ideas? Besides staying down south!
>> >
>> >
>> >
>> >
>> >
>> > On Nov 23, 2011, at 4:09 PM, jhlauterbach <jhlauterbach@BELLSOUTH.NET>
>> > wrote:
>> >
>> > > Hello Jim,
>> > >
>> > > Thank you for the suggestion. I have spare ECU with me. Will try
>> > > in the morning. My FL home in a quiet neighborhood and garage
>> > > lighting not the
>> > best.
>> > >
>> > > John
>> > >
>> > >
>> > >
>> > >
>> > >
>> > > ________________________________
>> > > From: Old Volks Home <oldvolkshome@GMAIL.COM>
>> > > To: vanagon@GERRY.VANAGON.COM
>> > > Sent: Wed, November 23, 2011 2:59:53 PM
>> > > Subject: Re: Need instructions on field R&R of AFM '84 1.9L Van down
>> > >
>> > > John -
>> > >
>> > > I had a similar problem with my 84 Westy several years ago on a
>> > > cross country trip coming back from Tennessee to Southern
>> > > California. From the Oklahoma line to Adrian, TX on I-40. I
>> > > stopped in Adrian to refuel and swapped the ECU. Fixed the problem,
>> > > it was a worn-out or bad ECU. Always carry a spare ECU and AFM,
>> > > along with a bunch of other spare stuff under the rear seatbox when
>> > > traveling and full-time living in my Westy. Sent the ECU to Python
>> > > to fix, reinstalled it, put the spare back in the seatbox. Now that
>> I'm
>> running the "F"
>> > > European ECU (bought from the late Boston Bob) for the past few
>> > > years, I've kept the original rebuilt in the seatbox as a spare.
>> > > Never know when yer gonna need it.
>> > >
>> > > Tested AFM, it was fine, but I keep a spare re-man as well.
>> > > --
>> > > Jim Thompson
>> > > 84 GL 1.9 "Gloria"
>> > > 84 Westfalia 2.1 "Ole Putt"
>> > > 72 411 Station Wagon "Pug"
>> > > 75 914 1.8 "Nancy"
>> > > Full Timing Since March 1999
>> > > oldvolkshome@gmail.com
>> > > http://www.oldvolkshome.com
>> > > Find me on Facebook:
>> > > http://www.facebook.com/people/Jim-Thompson/100000710343835
>> > > ***********************************
>> > >
>> > > On Wed, Nov 23, 2011 at 7:13 AM, jhlauterbach
>> > > <jhlauterbach@bellsouth.net> wrote:
>> > >> I barely made it to my Florida home last night. Started out from
>> > Macon,GA,
>> > >> where van had been running "like new." About forty miles down I-75
>> > >> van
>> > had
>> > >> of-and-on moments all the way to Valdosta (about 150 miles). Van
>> > >> was
>> > idling
>> > >> rough but evened out after I filled the tank. Went next fifty or
>> > >> so
>> > miles but
>> > >> then performance got erratic, especially when going up hills.
>> > >> Finally
>> > made it
>> > >> to north side of Ocala and van would not idle when I got off I-75.
>> > Refilled
>> > >> tank and made it across FL 40 and down US 17 to my home and into
>> > >> with
>> > only
>> > >> having to stop at one light.
>> > >>
>> > >> I suspect AFM. My office is sending me my spare so it gets here
>> > >> Friday morning. In the meantime, need to see if I can repair the one
>> I
>> have.
>> > Need
>> > >> instructions on how to get top off AFM so I can clean contacts and
>> > >> make
>> > sure
>> > >> wires to connector are tight.
>> > >>
>> > >> Thank you,
>> > >>
>> > >> John
>> >
>>
>>
>
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