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If it's the same sportshift from the Protege, the computer won't let you hurt the engine. The engine has a rev limiter of course, but even if you have the sport shift engaged it will shift to the next gear well before you hit the rev limiter. This was atleast my experience when I sold Proteges. However, you really don't want to subject your engine to "jack-rabbit" starts or heavy acceleration during the break in. Mainly the whole purpose of the break in is to allow the oil to "soak" into all of the nooks and crannys in the engine. Once the engine is completley lubricated you can test the limits of the computer :) When I sold cars we had a Tribute come right off the truck and the engine siezed up with only 2 miles on the odo. That's Ford engineering for you.
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