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Old 04-29-2013, 11:41 AM   #25
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Originally Posted by 2007 fordfocus View Post
Just an update kept my foot out of it for a tank and got one more mpg lol.... no problems more power nice sound and more mpgs can't beat it lol..... also does anybody notice the whistling sound around 3000- 3500 rpm..... is it a problem?.... car is running fine and I think the whistling sounds kinda
The whistling is probably from the throttle body being half open since you aren't flooring the car. Not an issue.
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