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There’s a cube relay under the passenger seat that controls the oxygen sensor stuff. After I went down a lot of rabbit holes with nothing curing the rough running, I replaced that $10.00 relay and the car ran perfectly. Maybe that’s the problem maybe not. If the price is right for the condition of the car, buy it. Everything on the CIS can be fixed. You might need refurbished used parts like a WUR but that’s not a problem.
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1980 911SC Targa
1990 S2 Cabrio (sold)
2004 C4S (sold)
2006 Boxster (sold)
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