Cleaning the Throttle Body
Senior Member
Joined: Jul 1999
Posts: 1,929
Likes: 1
From: Oklahoma City
My 2006 4.6L F150 with 214k is having the rough idle when cold, sometimes no cold start issue. Always starts warm, slightly rough idle. Is a dirty TB a likely culprit? What gaskets/materials will I need to get before doing the job? Does the 2006 have coolant hoses attached to the TB?
Junior Member
Joined: Jul 2014
Posts: 4
Likes: 0
Where do I find a new elbow?
97-98 Throttle body w/coolant tree.
Hot coolant travels through the tree and taps into the heater core line behind the lower intake. This helps heat the plenum. The PCV line which plugs into the tree in line with the plenum and re-enters in back of the manifold also helps heat the plenum. It's the Cold Climate System used in the 97-98 model years. These systems may be in later models , I haven't seen one in a 99 yet.
Hot coolant travels through the tree and taps into the heater core line behind the lower intake. This helps heat the plenum. The PCV line which plugs into the tree in line with the plenum and re-enters in back of the manifold also helps heat the plenum. It's the Cold Climate System used in the 97-98 model years. These systems may be in later models , I haven't seen one in a 99 yet.