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Ford Truck Club Forum > FORD F-100 | F-150 SERIES > 1997-2003 Ford F150

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Old April 27th, 2015, 07:10 PM
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nmorse1234 nmorse1234 is offline

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Default 98 f150 v6 vacuum diagram

Hello does anyone have a diagram of the vacuum lines. I.e the line from the PCV goes to? Does that lin run straight to the idle air intake sensor or does it go to multiple spots? I think the line that goes from the idle air intake sensor and down the left side of the motor towards the PCV valve has a leak. Was going to run a line on the outside so I don't have to take off anything. but want to make sure that the line is a direct line first.
Old April 28th, 2015, 12:48 AM
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The PCV valve should have a large vacuum line going from it direct to a vacuum port on the intake manifold.

2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS
Old November 7th, 2016, 04:09 PM
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ur pcv valve should run from the valve to the top of ur manafold but mine also runs to the back of my engine. I have found a splitter that runs from the pcv valve. I also have a 4.2 but is a 97. I found that my problem was the pcv valve was sitting on top of where it was supposed to be and had two vacuum hoses running to it is that normal do u know? I cant find a diagram of the hoses either.

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