Not sure if this has been said..but the oil sensor behind the pulley will
cause the same sysmptoms.  Pretty easy and cheap fix.
Michael in San Antonio
91GL Weekender AT 2.1L 'Gringo'

On Sun, Jan 15, 2012 at 1:45 PM, Jim Arnott <jrasite@eoni.com> wrote:

> Black spots = oil leak
> Gray spots = fuel leak (and a fairly massive one I suspect. I'd look
> at the little hoses between the injectors.)
> Shiny spots = coolant
>
> SuperClean gets it off.
>
> BTDT.
>
> Jim
>
>
>
>
> On Jan 14, 2012, at 10:48 AM, ralph meyermann wrote:
>
> I've noticed on some of my drives I've been getting grey oily spots
>> on my
>> rear hatch! I believe its unburnt fuel!! Possible bad injector/s. Was
>> thinking having my friends preferred diesel shop do injectors and go
>> through the pump too maybe raise the psi too?? Hoping for better
>> fuel burn
>> for more mouse power and fuel economy and minimize the mess on my rear
>> hatch!
>>
>> Velma 82diesel 1.6 na westy
>>
>>