Date: Thu, 26 Sep 2013 19:52:00 -0400
Reply-To: TonyCollins <tonycollin@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: TonyCollins <tonycollin@GMAIL.COM>
Subject: Re: Digijet rough/wandering idle and bucking at slower speeds
In-Reply-To: <CAMuoOU4BVNV=W7Jc7d5u+O6v+vyuP3j9+BUaDuZJcLQz3xSX4Q@mail.gmail.com>
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Let me offer vacuum. My guess jostling of the air into the mixture. Makes me wonder are the new injectors properly sealed/seated.
That is my only guess
Gl
Tony
Sent from my iPhone
On Sep 26, 2013, at 7:34 PM, John Meeks <vanagon@GMAIL.COM> wrote:
> I'm gonna guess an FI connector is loose/corroded or a wire to an injector
> is broken under the insulation and intermittent.
> On Sep 26, 2013 5:02 PM, "Skip" <skiplaubach@comcast.net> wrote:
>
>> Update: Drove at lunch today and the engine ran beautifully. Did notice
>> when I drove over a rough railroad crossing that the van immediately
>> started bucking.
>>
>> My diagnosis (not validated) is either a fuel pumping interruption (from
>> the bumps) or the ECU gets "confused" when jostled over bumps or the AFM
>> gets whacky from the bumps. The ride smoothed out less than 100 yards
>> beyond the crossing.
>>
>> The difference between this morning and lunchtime runnability was
>> incredibly large. I think the fact that runnability is not consistent is a
>> data point.
>>
>> Anyone hazard to provide a root cause?
>>
>> Skip
>>
>> ----- Original Message -----
>> From: Skip
>> To: Vanistas
>> Sent: Thu, 26 Sep 2013 15:33:58 -0000 (UTC)
>> Subject: Digijet rough/wandering idle and bucking at slower speeds
>>
>> '84 1.9L (with the 2200cc GW upgrade), digijet WBXR
>>
>> Just installed the Sorensen fuel injectors (w/new seals) on Sunday. Made
>> in America. On sale at a FLAPS (local A-Z). Noticed an improved smooth
>> idle and acceleration immediately versus my (recently cleaned OE FI's. I
>> had to fiddle with my idle versus the OE FI's. The Sorensen FI is a "disk"
>> versus the OE, which is a "pistel" type FI. Some recent chatter on
>> thesamba about these.
>>
>> Then, I drove my Westy to work this morning.
>>
>> The idle was rough and wandering, in fact the
>> engine died a couple of times at stoplights (started right back up,
>> fortunately). Some bucking in 2nd and 3rd gear. Wondering about a
>> vacuum leak, timing, O2 sensor, fuel filter, fuel pump, ECU. I can put my
>> hand on the problem but never my finger...
>>
>> I'm leaning toward a vacuum leak and more work on idle adjustment.
>>
>> Ideas? Thanks.
>>
>> Skip
>>
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