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96 F150 5.8 High Idle... and I've replaced everything! Please help!

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96 F150 5.8 High Idle... and I've replaced everything! Please help!

Old 11-26-2018
  #51  
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Join Date: Nov 2018
Posts: 3
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have you checked for flow by? Otherwise it has to be a vacuum leak, while its running spray some carb cleaner on your vacuum lines, if it revs up its vacuum. Also check your mass air flow sensor, mine did the same thing, all gummed up.
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