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Black oil, loss of power. 91
91 with 165k miles. Running strong till about a month ago, sudden rough idle, loss of power across all gears..very slow acceleration. Changed plugs, rotor, cap, wires, fuel and air filters with only a slight improvement. Not burning coolant (atleast I don't think so) no moisture in exhaust except on cold start, but even then no white smoke. Oil is jet black 50 miles after oil change, happened twice. All cylinders firing except 6 (furthest from radiator) Plug no 6 has serious carbon build up, replaced again and carbon builds up almost immediately. Replaced O2 sensor when I smelt fuel in the exhaust, good results but a lot of carbon lines the exhaust. Used seaform in fuel and into vac lines, not much help. Thought the cat convertor was clogged, replaced it and not help. Timing belt was replaced about 20k miles ago.
Biggest symptom is black oil, no power, no 6 cylinder carbon and apparently little/no ignition in it (6) Talked to a mechanic over the phone and he says 90% chance no 6 compresion ring snaped or something and its dumping fuel into oil. Whats you take, I will do anything to save my Cress.
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