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JimA=> Backfire is caused by overrunning the engine with the throttle => closed ... This may be true, but exhaust leaks also cause pops. Witness my '78 FI camper, which popped like a sumbitch all the way down my hill every time until I finally got the exhaust welded up. No pops since. And not to be pedantic, but just to keep the faith, we must be reminded occasionally -- backfire is when you actually get fire up through the carb, a much more serious symptom than exhaust popping. Steven Ayres, Prescott AZ '66 KG1600 ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/