Can you restart it immediately and it runs good again?

I was having this problem with Grover as well. The great minds of the list
have provided me many good opinions - I haven't decided which it is but I
have managed to get it running better. Here is what I have done.

1. First I was told O2 sensor. I that is very possible but Grover doesn't
have an o2 sensor (it's a long story but he will have one when I can afford
a proper exhaust)

2. The Temp 2 sensor. I put in a new temp 2 sensor and it seemd to fix the
problem but about 2 weeks later it started again. So I put in another new
one and all is well. However I'm not convinced that was the problem either
because.....

3. I was then told is could be the wiring. The reason I think this might be
it is because after the second new Temp 2 sensor I did experience the same
problems again one day. So I pulled over and unplugged the wiring from the
Temp 2 sensor and reseated it. The problem went away.

I was experiencing the same problems you described. Running fine, black
smoke, and only 150 miles to a full tank of gas (as opposed to 275-300 miles
when running correctly). You could be having troubles due to any of the
three reasons above. I think mine was the wiring (because the harness was
transplanted from my parts bus) but your issue could easily be O2 or Temp 2.
I am no expert by any means but I wanted to share what I went through
because this is an extremely frustrating issue - I about pulled what was
left of my hair out trying to get it working.

Good luck I hope you are able to solve this quickly.

On 8/6/07, A. Hurley <ahurley@viewit.com> wrote:
>
> Seems like I get it all tuned up and then have an issue. ...
>
> The van runs fine for awhile and then shoots out black exhaust,
> hesitates.
>
> If we turn it off and let it rest it runs normally agian.
>
> It does need a new fuel filter, and now the O2 sensor is fouled (black). I
> gently wiped it off just for the heck of it.
>
>
> At first, acros WA, we just halved our gas milage!
>
> Checking emal via cell
> phone - any ideas or wizards in the area?
>
> Thanks,
>
> Andree
>
>
>
>
>
> Sincerely,
>
> Andree Hurley
>
> Viewit.com
> https://www.viewit.com/
> KIX:
> http://www.onwatersports.com
>

--
Thanks,

Jeff
90' Carat (Grover)
86' (We call this one Parts)
85' GL (Preparing for reanimation)