Thanks everyone for all this great information.

        Of course, after reading all of it I�m no longer sure where to begin!  At first it seemed like most thought it was a failing Hall Sender.  then possibly a failing electrical connection.  Or maybe the temp 2nd sensor or a leaky fuel injector.

        Also, this is very hard to diagnose as it only happens after a fairly long drive and only when  the van is re started very quickly.  Luckily even a 5 minute wait is enough to get it started normally again.

My diagnostic skills are growing but limited at this point.  So, I may have to wait until the problem becomes more evident.  

Still despite the cost I�m very tempted to replace the hall sender and keep my fingers crossed that I have the solution.

So still contemplating my next action.  I don�t have any known good spares of any of the mentioned parts to try.

thanks again all and I�m keeping all this info handy as I move forward.

Eric Caron 
85 GL Auto Westfalia 

>>> 
>>> On 9/14/2015 11:17 AM, James wrote:
>>>> oh..fwiw ..in all things car performance related ..I find poor
>>>>>>> connections being the real cause as much as a good 60 to 70 % of the
>>>>>>> time...and it being 'a component' that's bad the rest of the time.
>>>>>>> ...i.e. it's not 'always'  A Component at all.
>>>> As someone who teaches electronics for a living, and has spent all of his driving lifetime dealing with "old cars" (our family fleet averages 18 years old!), I want to strongly echo this observation.  Very strongly.  Very, very strongly!
>>>> 
>>>> Always check every electrical connection in a circuit.  Never assume that 30 year old little plastic connector and it's aluminum or brass strips is still 'all right'.  I had a Rabbit once that had a completely dead ignition system, due to a single bad crimp in a single relatively inaccessible plastic connector.... it was hard to reach, but surely that little wire was find, right???
>>>> 
>>>> James
>>>> Ottawa, ON
>>>> 
>>