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Car is a 2000 Boxster S , had an RDN 3.2 engine put in 40k miles ago 10 k ago Bank one head developed a crack and dumped oil into coolant .Heads were pulled sent to a Porsche head specialist who preformed a pressure test .Repaired head checked vale springs did a valve job. I put the ending together .All new Porsche gaskets , ARP head studs. The engine has not run correctly since then . I took it to a shop around the corner and they said I had multiple misfires . I replaced all the coils twice the plugs mass air flow sensor, air filter (stock) , O2 sensors . Car has no codes .
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