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expensive but, go get an SCT reprogrammer

( i got at focussport.com) and the new profermance program will allow you to change timing between 3 ranges. 0-2000,2000-4000, and 4000-6000. also fuel/air ratio, idle speed and optimizes fuel use.

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15y ago
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Q: How do you adjust the timing on a 2007 Ford Focus?
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