Brian,

My thought is "TIMING".

Ron Semko
Orlando, Florida
1984 Vanagon with 200,000 plus miles

Brian W. Block wrote:

> Hello all--
>
> Any hints or suggestions on this one?  I've done a top end rebuild on the
> 83 van (air-cooled) and now it seems to be running o.k, but Im experiencing
> excessive backfiring (the van, not myself)  Its not real loud, but just
> noticeable when you let off the gas.
> What could cause this?  I'm stumped.
>
> Regards,
>
> Brian