it may not cure the problem.  i have the harness and still
had the
stumbling pronblem.  One thing that seems to work is to
replace the
coolant temp sensor, the o2 sensor, do the wire harness
($100+) or the
capacitor fix ($4), check the AFM wiper arm for dirt,
contact and wear on
the contact plate it slides across, check grounds, change
fuel filter.
It seems the pople who do these maitenance items in one
swoop have
success it curing the problem..
steve
zyno wrote:

> Hi, sorry for so many questions.  Is it worth while to do the wiring
> harness upgrade for my 86 vanagon?  The erratic running of the engine
> and the intermittent loss of power is driving me crazy!
>
> Thanks again, in advance,
> Tony