Hi Jerry,

That is an excellent idea; the problem is that it can only be
implemented at a time when the failure is occurring.

So far the problem has been an occaisional inermittent issue, happening
for at most 2-3 seconds (usually a lot less) while operating at highway
speeds. There's no opportunity to get out and do any checking; the only
instruments available for diagnosis are the tach and speedometer.

In the interest of piece of mind and public safety I would prefer to be
proactive and resolve this issue BEFORE it puts me at roadside with a
meter; so a new coil, cap, rotor, polug wires and distributor are soon
to be installed.

Happy Trails,

Greg Potts
1973/74/79 Westfakia "Bob the Tomato"
1987 Wolfsburg Weekender Hardtop
www.busesofthecorn.com
www.pottsfamily.ca

Jerry wrote:
> Why not perform the continuity and voltage
> checks as listed in the Bentley.  These tests will
> check your coil, hall sender harness, ECU
> and the hall sender. You can do all these checks
> with volt/ohm meter.
>
>
> JB 88GL Guido
>
>
> On 3/1/09 11:36 PM, "David Beierl" <dbeierl@ATTGLOBAL.NET> wrote:
>
>> At 11:27 PM 3/1/2009, Scott Daniel - Turbovans wrote:
>>> it would be interesting to rig a timing light so you can observe it while
>>> driving.
>> Actually, rigging a logic probe to the Hall sender input of the ECU
>> would immediately tell whether the distributor/wiring is the culprit
>> or not.  Or a scope, of course.  But last I knew Radio Shack sold a
>> logic probe for $25.
>>
>>
>>   --
>> David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
>> '89 Po' White Star "Scamp"
>

--