TB vacuum specs - JeepForum.com
 
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post #1 of 6 Old 07-25-2020, 07:39 PM Thread Starter
Hipmusicman
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TB vacuum specs

Does anyone know the specs for all the vacuum lines around the TB on the 4.7?

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post #2 of 6 Old 07-26-2020, 07:08 PM
97Mule
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What do u mean by specs?


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post #3 of 6 Old 07-28-2020, 04:38 AM
Bigrigr
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Maybe he means he needs a diagram showing where they all go?

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post #4 of 6 Old 08-01-2020, 06:40 PM Thread Starter
Hipmusicman
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I was asking about the correct vaccum pressure at each line coming from the TB. I realize they should all be close to the same value. I also learned that I depends on barometric pressure and a few other factors. It seems the best place to check the vaccum might be at the PCV valve.

Although, my actual issue (high idle) seems to be a poorly installed intake manifold. Found leaks all the way around at the gaskets when spraying TB cleaner near the ports. Just to check, I went around and torqued all the bolts correctly. They were barely tight in the first place. Engine is brand new and nearly every day I find something that was missed or done incorrect. Add it to the long list of issues I've come across from every single shop I've ever taken any vehicle to.
I'm going to take it back to the shop to have them do it right.
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post #5 of 6 Old 08-01-2020, 07:26 PM
CarlJH
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that would scare me a lot, thinking they couldn't even put the intake manifold on correctly which is bolted on with 12 bolts onto a flat surface!
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post #6 of 6 Old 08-03-2020, 08:09 PM Thread Starter
Hipmusicman
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Quote:
Originally Posted by CarlJH View Post
that would scare me a lot, thinking they couldn't even put the intake manifold on correctly which is bolted on with 12 bolts onto a flat surface!
I'm taking it back in to have them fix it. I'll be in the shop keeping an eye on it so if something isn't right about it again I'll know.
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