2007 4.6 Poor Idle Saga
03-01-2016, 01:27 PM
#22
Senior Member
This sounds like what happened to mine. My issue turned out to be the phasers and the VCT Selnoids. Watch this video, he demonstrates a way to determine if the issue is the VCT selnoids.
03-01-2016, 09:04 PM
#23
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The VCT theory makes sense. I'll start saving pennies to purchase new solenoids and valve cover gaskets. It will probably be a while though, so other suggestions are welcome, especially cheap ones.
03-01-2016, 09:07 PM
#24
Cycle For Fun and Health
03-02-2016, 09:17 AM
#25
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Has anyone personally tackled the VCT replacement? some Youtube guys take the valve covers off, some just pop the VCT seal on the valve cover and reach in. If I can confirm that someone has done the swap without removing the valve covers and everything went smoothly, that saves me a few bucks and a big headache.
03-02-2016, 09:19 AM
#26
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You could always try the "pop the VCT seal on the valve cover and reach in" method first; if that does not work for you, then remove the valve cover.
03-02-2016, 09:27 AM
#27
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Fair, but that means either buying the valve cover gaskets to have on standby or leaving the truck torn apart until I go get the gaskets.
03-02-2016, 09:28 AM
#28
They're cheap... go get a set
03-02-2016, 06:21 PM
#30
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The VCT gaskets should be replaced no matter what. My question is: did you manage to replace the VCTs without removing the valve covers? Besides just being a PITA, removing the valve covers requires new valve cover gaskets for reassembly.