Question about 2004 Ford F150
Just an F150? no further information......... I'll give it a shot.
Bad power steering pressure sensor
Bad IAC Circuit
Intermittent Vaccume leak (V8's have this issue with the PCV tubing)
Floor mat stuck over throttle :P
Posted on Oct 23, 2013
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Posted on Jan 02, 2017
SOURCE: Idles bad
Sounds like you may have an upper intake manifold leak. Typically the gasket between the Plenum and the lower intake dries up and gets sucked into the intake a little causing a leak and a high idle issue. The repair requires the removal of the plenum and replacement of the gasket. NOTE: there is a torx bolt hidden between the center plenum runners and can only be seen by looking straight down at the top of the plenum and it may be covered in dirt. If you have to use a bar to pry off the plenum you probably have missed a bolt. Typically it is the one noted above. Best of luck.
Posted on Mar 22, 2009
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