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> I think that the reason that people believe that it's an exhaust leak > that causes backfires is that that is where they see or hear the > backfire happening. The fact is that it must be the case that it is > engine tuning that is the cause of any backfire. Incorrect valve lash, > incorrect point gap, incorrect plug gap, incorrect timing, imporperly > jetted carbs, manifold leaks can all contribute to backfires (or any > combination thereof.) It also stands to reason that it is real easy to > swap in a new exhaust system versus trying to tune ones car. When one > calls any of the advertisers in the various VW magazines, they > undoubtedly say it's an exhaust leak which causes backfires and they > have an exhaust system that MIGHT cure it. Check out the true cause(s) > of your engine ails and don't just start swapping parts. > > I think that part of this "Hobby" of ours is to become enlightended > about the workings and engineering of our cars. They are designed a > certain way to be operated a certain way. Ours is to understand what > that "WAY" is not just swap parts for the sake of being "cool". Wow, wish I'd said this!! Jim - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA *******************************