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On Mon, 2003-08-04 at 10:45, Everett Barnes wrote: > > >The right hand pipe is still backfiring. Both carbs have always seemed > a bit on the rich side (evidence is lots of black carbon on inside of exhaust). > Can a carb related issue cause the backfiring? I am no expert, but my > limited knowledge tells me that this is not as likely a carb issue. > > > For me, backfiring out of the exhaust has always been dwell or timing. > Backfiring out of the carbs. (up from the throat) has always been a too > rich mixture. Have you tried adjusting the mixture screw(s)? > A serious vacuum leak will cause popping in the exhaust. And since he had a carb come loose, I would pull the intake manifold and check the gasket. > >2. There are 2 "pipes" that are part of the 2 piece housing around the > main fan. These were plugged so that all of the air was forced onto the > cylinders. The right hand plug is gone from the housing. This makes less > coiling air going across the cylinders? > > > Yes. I personally would not drive anywhere with one of those wide open. > If you are desperate, you can cut a soda can in half and use a hose clamp > to block off the loss of air. I've done this to get cars back to my house. > Always carry a roll of duct tape, like Red Green. -- Russ Wolfe '66 FB MT '71 FB AT '65 Bug (not running) russw@classicvw.org http://www.classicvw.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org