Question about 1988 Ford F 150

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REPLACED AIR FILTER WITH A K&N AIR FILTER

TRUCK HAS A HIGH IDLE

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Air filter not the problem look for hose off around air box.

Posted on Nov 27, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

emissionwiz
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SOURCE: ford truck f250 v8 motor idles high

the vacuum leak that causes this high idle is the gasket at the bottom of the upper intake manifold runners, they **** in, done 100's. to confirm this just spray carb cleaner at inside and outside base, when u hit the leak you will hear it. see photo.

29f44ce.jpg

Posted on May 10, 2009

  • 229 Answers

SOURCE: I replaced fuel filter and air filter on 1999 ford

tune up replace plugs and wires if did and still shudders check coil packs

Posted on Feb 25, 2011

  • 449 Answers

SOURCE: rough idle on a 1994 Ford Ranger

Get a full tune up, how is your gas millage? if your gas millage is bad then you should suggest changing your o2 sensors.

Posted on Jun 06, 2012

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