[T3] I think I found my stalling problem!

[Phil Hof]

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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