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1989 964 C4 Help!

Electrical and Electronic

Vehicle Information: Year: 1989; Body Type: Coupe; Engine (type, size, modifications): 3.6 normally-aspirated, no modification; Total Mileage: 172,000;

Over the years, my C4's engine has quit for no reason, rolling or still. Recently, it has gotten much worse. It idles very rough (intermittently). All engine warning lights occasionally come on, yet the engine keeps running, and they reset O.K. At these times, the horn doesn't work. The cruise control has always been intermittent. Background - the air conditioner has been disabled and the ABS does not work (both lights remain constantly on.) Total Mileage 172,000

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