[T3] I think I found my stalling problem!

[jadney at vwtype3.org]

Yes, I can still do this. I'm afraid it's quite a bit of work, just getting to the transistors and 
sealing the brains back up, so it costs $50 per brain, plus shipping. If you'd care to send both 
at once I could take $10 off the second one.

Before you go to the trouble of sending them to me, let's make SURE the brain is the 
problem. Have you checked the wire #19 connection in the engine compartment? Sometimes 
that gets disconnected and reconnected loosely. Do you know where that is?

If that looks good, makeSURE that shorting that connection to ground makes the pump run.

If that works, when you remove the brain, short #19 in the brain connector to ground and 
verify that the pump then runs.

If all those things work, that narrows it down the something, the transistor, inside the brain.

Jim 

On 15 Nov 2023 at 20:12, Phil Hof wrote:

> Hi Jim,
> I am answering for the group´s benefit.
> No, I installed a jumper and have been running it that way ever since.
> I would like to repair both the failed ECU and a backup ECU´s transistors.
> Do you still offer this service and/or parts?
> Thanks,
> -Phil
> 
> 
> 
> > On Nov 14, 2023, at 1:06 PM, type3-vwtype3.org-request at lists.vwtype3.org wrote:
> > 
> > Message: 2
> > Date: Tue, 14 Nov 2023 09:24:18 -0600
> > From: "Jim Adney" <jadney at vwtype3.org <mailto:jadney at vwtype3.org>>
> > To: type3 at vwtype3.org <mailto:type3 at vwtype3.org>
> > Subject: Re: [T3] I think I found my stalling problem!
> > Message-ID: <65539122.6881.57F093F8 at jadney.vwtype3.org <mailto:65539122.6881.57F093F8 at jadney.vwtype3.org>>
> > Content-Type: text/plain; charset=ISO-8859-1
> > 
> > I came across this post from over a year ago and wondered if Phil ever got 
> > the transistors fixed, and, if so, did it fix the problem?
> > 
> > On 30 May 2022 at 10:08, Phil Hof wrote:
> > 
> >> I noticed the fuel pressure dropped near zero, followed by the sputter and
> >> stall.  At first I assumed the pressure dropped BECAUSE of the stall, but
> >> it looks to be the opposite!  One stalled, the pressure stayed low during
> >> cranking.
> >> 
> >> Faulty fuel pump?  I jumped terminal 19 to ground, and the pump operated. 
> >> I could see it stayed steady at 28 psi, and with the remote switch she
> >> started right away and was stable.
> >> 
> >> So AGAIN, the pump relay ground circuit, likely the output transistor, was
> >> failing when hot.
> >> 
> >> I had replaced my original ECU with a Bosch rebuilt unit from many years
> >> ago that I kept as a spare.  It worked? for a while, then the warm
> >> stalling happened.  The old one was a hard fail, this happens only when
> >> warm.
> >> 
> >> The odds are very small, but this is the likely culprit.  ITMll have Jim
> >> Adney replace my old ECUTMs transistor, and once done, maybe also the
> >> oenew? one to again have as a spare.
> >> 
> >> But if the temporary jumper works consistently for the next week or so,
> >> ITMll take the chance that this is the real fault, and leave the jumper
> >> in place for the Invasion drives.  I?ll want it to work correctly for
> >> safetyTMs sake, but this will be an acceptable risk to allow me to drive
> >> Clemmie, and not another non-VW vehicle in a couple of weeks.
> >> 
> >> I am excited, and I hope itTMs not misplaced.  I've had several
> >> oeaHA!? fixes, only to have new problems. Fingers crossed this is the
> >> last one!
> > 
> > 
> > -- 
> > *******************************
> > Jim Adney, jadney at vwtype3.org <mailto:jadney at vwtype3.org>
> > Madison, Wisconsin, USA
> > *******************************
> 
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-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************