[T3] I think I found my stalling problem!

[Jim Adney]

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!


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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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