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boost gauge install cant find p on throttlebody
http://www.4g61t.org/forum/viewtopic.php?f=26&t=32966
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Author:  natas [ Fri Jul 02, 2010 8:55 pm ]
Post subject:  boost gauge install cant find p on throttlebody

I'm looking for a P cast into the throttle body to hook up a boost gauge but not having any luck. I found a ton of threads on the subject and that seems to be the best place to T into. I'm pretty sure it's one of the lines on the top passenger side but I'm not sure if it's the red striped or green striped one. Maybe I'm looking in the wrong place or the markings wore off, any advice is appreciated.

Author:  Coltsfan [ Fri Jul 02, 2010 9:04 pm ]
Post subject:  Re: boost gauge install cant find p on throttlebody

Put a T fitting on the FPR line.

Author:  89Mirageman [ Fri Jul 02, 2010 9:14 pm ]
Post subject:  Re: boost gauge install cant find p on throttlebody

Quote:
Put a T fitting on the FPR line.
Yep

Author:  natas [ Fri Jul 02, 2010 10:18 pm ]
Post subject:  Re: boost gauge install cant find p on throttlebody

Thanks for the help works perfect. :D

Author:  Flying Eagle [ Sat Jul 03, 2010 3:58 pm ]
Post subject:  Re: boost gauge install cant find p on throttlebody

Just remember to zip tie that line and make sure there are no holes in it. It is the best spot to grab boost from, but, it also leans out the motor really bad if it ever starts leaking or pops off. Just posting this up for anyone tapping in for the first time.

Author:  natas [ Sat Jul 03, 2010 10:15 pm ]
Post subject:  Re: boost gauge install cant find p on throttlebody

Thanks for the info I remember reading about the lean condition in another thread that is one of the reasons I was looking for the port marked P or an alternate source. I am planning on getting a wideband soon but until then is there any signs of a leak to watch for besides the obvious hissing?

Author:  Flying Eagle [ Sat Jul 03, 2010 10:27 pm ]
Post subject:  Re: boost gauge install cant find p on throttlebody

No, but a boost leak will cause running rich under boost, and cause a vacuum leak under low rpm conditions.
Best to get good new silicone or proper reinforced rubber vacuum hose in their for the install from the very beginning.
Do not trust the original vacuum lines for that section, especially when tapping in.
Then add the zip ties to the fittings. Oh, a metal T section would probably be best as I have comprimised for years
using a one size fits all T section made of plastic - god I'm behind on the reliability upgrading again! Drats.

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