[T3] gas mileage, voltage, etc.

[Walter Howe]

Try disconnect the brain- cut the loom of wires - disconnect every wire to brain at other end- check all wires with mom meter- one is grounding out killing the brain

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________________________________
From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> on behalf of Jim Adney <jadney at vwtype3.org>
Sent: Saturday, June 24, 2017 12:13:27 PM
To: type3 at vwtype3.org
Subject: Re: [T3] gas mileage, voltage, etc.

On 24 Jun 2017 at 14:15, Daniel Nohejl wrote:

> Bluntly put, WTF? How does this happen?
>
> I just installed my last B brain and am about to drive more than 3k
> miles to Oregon in a little over a week......

My best guess is that some of the brains I've bought came via ebay over the
years. There was at least one purchase of a bunch of them, but they're all
mixed now. I've gone thru most of them and quick checked each of them, but
they never got any long term testing like you've done. It's conceivable that
someone collected a bunch of bad ones over the years and then sold them
to me. But that seems unlikely, since bad ones would usually be exchanged
for rebuilds from Bosch.

The only other possibility is that there is something weird about your car that
tends to kill them. I don't know what this might be, but it remains a possibility.
What if the Teflon insulated wire that was used on your aftermarket FI wiring
harness was poorly chosen? Teflon has a tendency to "cold flow" and it's
possible that would allow an unfused 12 V hot wire to short out to something
in the brain that couldn't take that amount of voltage or available current.

This means that I should soon have 2 bad ones from you. If I have time to do
post mortems on them, that might tell me something.

I'll send you a couple more and you can bring the bad one here when you
stop in Madison.

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

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