a hole in the headers is  going to  effect what the o2 sensor is
reading.  it will then try to adjust your fuel flow accordingly.
jimt
On Sunday, Sep 29, 2002, at 17:50 America/Denver, William Copich wrote:

> My 89 vanagon is running real rich.
> I have a serious hole in the header pipes, but not bad enough to try
> to replace it before winter.
> When running driving the performance is very poor sputtering and
> spitting until I turn the ignition switch off and then immediately
> back on.  It runs fine, for about a minute then degrades rapidly to
> sputtering and spitting.
> Could this be an oxygen sensor problem?
> Maybe somebody can identify the source of  this problem.  If not, is
> there a data base where I can search for possible solutions?
> tnx
> bc
>