Date: Thu, 13 Sep 2018 15:43:22 -0700
Reply-To: Don Hanson <dhanson928@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Hanson <dhanson928@GMAIL.COM>
Subject: Re: [VW gas I4 Conversions] weird engine behavior,
stops on downhill coasting, diagnostic help?
In-Reply-To: <115701d44bb1$0f247890$2d6d69b0$@gmail.com>
Content-Type: text/plain; charset="UTF-8"
My version IS the vanagons... I ve
always been able to install Vanagon parts everywhere except for the hard
parts of the engine..
it was converted using everything Vanagon...
On Thu, Sep 13, 2018, 3:28 PM Stuart MacMillan <stuartmacm@gmail.com> wrote:
> Does your version of Digifant have the idle control module integrated with
> the ECU or is it separate like the Vanagon's? If it's separate and ECU
> replacement doesn't help replace it.
>
> Stuart
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Don
> Hanson
> Sent: Thursday, September 13, 2018 3:22 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: [VW gas I4 Conversions] weird engine behavior, stops on
> downhill coasting, diagnostic help?
>
> Thanks all. The TPS clicks correctly, but maybe it's faulty..the fuel
> pressure regulator...hmm, I have no other indications of fuel problems
> except when I coast, and only sometimes...all other running conditions,
> everything is perfect..
> Idle, full throttle, up and down, pump the gas... can't get any fueling
> misbehaving anywhere.
> I think I will swap the fuel pump relay and the ECU...first.
> Thanks again...
>
> On Thu, Sep 13, 2018, 2:40 PM Michael Kubler <michael@kublers.com> wrote:
>
> > What about fuel filter? Just grasping at straws here.
> >
> > Mike
> > 971-322-7145
> >
> > On Sep 12, 2018, at 19:00, Don Hanson <dhanson928@gmail.com> wrote:
> >
> > 84 vanagon, digifant, inline ABA Jetta motor....I've recently replaced
> > the fuel pump and filter and the sparkplugs. Lubed the throttle linkage
> with
> > light spray lube. All was normal "reading" with the spark plugs. I
> > replaced the fuel pump after the old one failed (not so sure now) as I
> > recall a sustained downhill just prior to the pump failure...However,
> > I put on my spare and all was good, then replaced that with a new Bosch
> and still
> > all good. The motor sounds perfect, has plenty of power, no smoking or
> > missing....smoooth running and sweet sounding, as always. Same fuel
> > economy....
> > But I was feeling an occasional hesitation after a sustained
> > downhill with no throttle, have been feeling that occasionally, but
> > not serious, till it stopped recently and I swapped the fuel pump on the
> road, then
> > replaced the spare. I've put a few hundred miles on since that, with no
> > signs of what happened tonight, twice.
> >
> > Coastng downhill (about 6% grade) for perhaps a mile with no
> > throttle at all, then step back on the gas and nothing....No warning
> > lights, normal gauges temp and oil temp...just no motor...So I cycle
> > the on off ignition and get a few seconds of power than sputter and
> > dies...still coasting downhill...cycle again with the key and I get
> > another burst of power, then off...repeat, than it clears up and
> > continues on, but I am careful to leave some throttle on and no more
> weirdness...till I encounter another 3000"
> > descent...Same deal...coast for a mile or so without any gas on and when
> I
> > step back into it, nothing! Another 4 or 5 off and on with the key and
> it
> > again clears up and runs normal.....No smoke or anything, Feels sort
> > of like the fuel is shut off,,,but only after I coast downhill for a
> > mile or two with the throttle shut....Uphill at 4000 or 5000 rpm and
> > full throttle, its smooth and happy....going through the mountains in
> > all 5 gears like Dan Gurney, its sweet....if I keep a bit of throttle
> > on going downhill, it seems to behave, but let completely off and it
> > sometimes just quits, till I cycle the ignition and get it back (so far
> that works)
> > Anybody have any ideas? I am thinking throttle stop switch or maybe
> > fuel pump relay...or maybe ignition switch....Help?
> > Don Hanson
> >
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