HI PEOPLE OF THE WORLD....

Ive a M5 E34 3.6L... And i have a big problem with him... His motor and valvule are in good conditions, but he doesnt develop velocite has he should do, he only develop at 3500 rpm. Hes in a mechanic but
he doesnt have any ideia of what could be the problem. Is there any one that can help me? Ive alred mesure the ar compressure and its fine, the valvule pressure is ok, the Vanus is ok and the debimetro is ok to... Please anyone...
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