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348tb

  1. ferrari 1990 348tb engine problems

    Pre '99 V8s: GT4, 308, 328, 348, F355
    Hi has anyone encountered the problem below? The car is perfect when cold but once it reaches operating temperature, the engine begines to hesitate or "jerk" when it reaches around 4000rpm. My mecahnic has changed the throttle position potentiometer, the vacuum capsule below the air plenum...
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