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Loss of Power

Engine

Vehicle Information: Year: 90; Engine (size, modifications): 8 CYLINDER; Total Mileage: 112,000;

I can't get the car to accelerate over 3500 RPM's, even at high speeds. It just doen't have the zip that a Porsche should have. The transmission is new and the engine compression is fine. Can you explain the possible cause of the diminished power?

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