I'm not a Waser Boxer guy but I'd look for a leak in the intake air
system, possibly a split in your intake boot, gasket under your injectors
or bad electric connector to an injector.

Stan Wilder

On Thu, 13 Jun 2002 23:12:47 -0400 Ronald D Maxseiner
<RONMAXSEINER@PRODIGY.NET> writes:
> Before I bring my van to an untested repair shop I was hoping for
> some help from the list.  I've had bad luck with repair shops in my
> area and would really like to avoid taking it to one.  I'm
> reasonably handy but I don't even know where to start with this
> problem.
>
> My problem is that the van is backfiring when it is starting. Not
> all the time but every fifth or sixth time.  It also seems to happen
> more when the engine is hot.  This seems to be causing my exhaust
> header on the left rear cylinder to slowly be blown apart.  I've
> tried repairing the header with a patch kit but every time it
> backfires the repair is blown apart.
>
> Here are my guesses as to what it could be.
> 1. Leaky fuel injector on this cylinder. While it is sitting it
> leaks gas and on start-up it backfires.  This seems to fit the
> symptoms and is my pick but how do I test this?
> 2. Running rich when it is starting.  This doesn't explain why only
> one cylinder would be having a problem.
> 3. Leaky exhaust is causing the backfire. (Is this possible??)
> 4. ????
>
> Any help would be greatly appreciated,
>
> Ron Maxseiner
> 1985 GL Stinky Pete
>

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