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[T3] 68 Fastback FI (?) Issues - Diagnostic Help Requested


> I pull off the VR that was installed in the car and put in
> the "new" Bosch
> unit, making sure all wires were on the correct connectors.
> It was a bit of
> tight fit against the heater channel, but there was no risk
> of shorting the
> connection and the thick card stock that folds up over the VR
> is still in
> place.

<snip>

Some general comments: I've suffered several dead VRs on my FI (all
old parts). My symptoms were good idle when everything's running off the
battery. As soon as you pick up the revs and get onto the VR, you see
badly regulated volts (fluctuating, peaks as high as 17v), and the brain
can't deal with it, leading to almost undrivably bad running.
This can all be observed without actually driving the car - put the
voltmeter on the 12v terminal of the coil to see the regulator output,
while you pull the throttle cable by hand.

New Mexican solid state Bosch VR works fine for me. You've already spotted
that the case is D+. My writeup : http://vw1600e.org.uk/regulator/

-- 
Matt. UK.
'73 1600e FB.

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