Can I suggest the Moyer forum for A4 questions? There is a lot of expertise there on A4s not restricted to A4s in C&Cs 😉
Also I think from the sounds of it you may have a stuck valve or 2 or 3. They will collectively get you running again. Probably the first question will be compression numbers for all 4 cylinders. Joe Della Barba Coquina C&C 35 MK I Kent Island MD USA
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