by Anonymous on January 23rd, 2008

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My 1997 f-150 xlt 4.6 , idles rough ,but after rpms REACH 1500 it smooths out,

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by buck on November 29th, 2008
vaccume line bad. check in back of engine by firewall
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My 1997 f-150 xlt 4.6 , idles rough ,but after rpms REACH 1500 it smooths out,

Answers. 1 helpful answer below.

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My 1997 f-150 xlt 4.6 , idles rough ,but after rpms REACH 1500 it smooths out,

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