[Vwdiesel] Erratic Tach
ev32amd at yahoo.ca
Thu May 31 21:03:23 EDT 2007
actually my fuel gauge was acting up as well as my
radio. the radio turns on, the tape plays but no sound
to speratic sound.
i think i will check my battery connectors again.
--- Roger Brown <r.c.brown at ieee.org> wrote:
> Dave Heart wrote:
> > Has anyone come across a stock jetta gasoline tach
> that works fine for
> > about 15 minutes then becomes jumpy and finally
> stops? Always works fine
> > when engine is cold. I have been using Roger
> Browns basic design to
> > allow cruise control and gasoline tach in my
> camper diesel pickup. Have
> > tried relocating electronics away from engine heat
> to no avail. The
> > jetta tach was a used one.
> Two likely causes would be the voltage stabilizer on
> the back of the cluster PCB. Do the
> other gauges work fine? Other thing might be a
> loose wire at the back of the tach, maybe
> the vibration gets to it with engine operation.
> On my '82, I once had the tach cut out and I thought
> it was heat related (on the way to
> Las Vegas). Turns out the power or ground wire
> connection I made at the injector pump was
> loose and I guess with the heat and vibration, it
> would cut in and out. Tightened the nut
> back down and it was fine.
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
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