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1996 f150 vacuum lines

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Old 01-09-2019, 05:06 PM
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Default 1996 f150 vacuum lines

Any of you know the size of the vacuum lines on my 1996 f150? Thanks
Old 01-09-2019, 08:55 PM
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There are several sizes. Which ones are you asking about? Most of the colored ones can be replaced by ~3/16" (4mm) silicone. Click this & read the caption:


(phone app link)


'96 trucks do not have MAP, TAB, or TAD.
Old 06-05-2019, 08:29 AM
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Quick question Steve83, how would you best go about shaping the replacement silicone for bends? I've got enough feet in each color to do this, just need to do it.
Old 06-05-2019, 10:25 AM
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Silicone rubber can't be shaped. But it's very flexible.


(phone app link)
Old 06-05-2019, 09:51 PM
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It went better than expected. I found 2 cracked lines and now I have a peace of mind. I ordered them from silicone intakes OP. They have all the colors you should need and sell by the foot. I saved my rubber connecters but also grabbed some at the JY awhile back just in case.

Another question sorry, let me know if I should start a thread. This hose for the PVC valve seems to be too big in diameter, not completely sure if it was original. I notice upon movement of the line+PCV itself, there is a rattling that can come and go. S
Old 06-06-2019, 09:34 AM
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It's "PCV" and just put a zip-tie or hose clamp around the hose to pull it tight.

You really should wash that thing...


(phone app link)
Old 06-06-2019, 10:57 AM
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Excuse the auto correct, and yessir there's a hose clamp on both ends. Still, the rattling? Sounds like a paint can being shook. Thanks, I'll get a video up if it helps

Originally Posted by BLDTruth
If the PCV valve is rattling when you shake it, that's how you know it is still good

Maybe I didn't phrase my question right. I believe the pcv is working but it is extremely noisy at idle and even after moving it around it will return. I'll double check the fit. Thanks

Last edited by Centralcoast150; 06-06-2019 at 11:05 AM.
Old 06-06-2019, 10:58 AM
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If the PCV valve is rattling when you shake it, that's how you know it is still good
Old 06-07-2019, 10:31 AM
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If the PCV rattles constantly, there may be an engine problem that could be identified with a vacuum gauge. Follow the links in this caption:


(phone app link)


This one explains how the PCV system works:


(phone app link)
Old 06-07-2019, 12:41 PM
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Okay I understand a bit better. I'm a little restricted on time for a compression test although the one I ran years back resulted in normal readings across all cylinders. I do happen to have a vacuum guage and I can test some systems with a little guidance. Appreciate the help and I'm looking forward to diagnosing this clearly. The hoses seem to be in good shape and I just replaced all the vacuum lines



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