Hey cool forum. Anyways story goes i bought my first audi its a 94' 90cs quattro and all is fine and well. Till... i findthat the heater core is goin out. then today im driving and it felt like it was running on 4 cylinders? plugs? Coil? anybody have some advice?

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did you fix the heater core ... if not than overheating could be an issue

its bypassed for the moment and it hasent overheated on me but i think i figured out that i have a couple of burnt valves but im guna compression test it and see