CJ7 Carter BBD Vacuum Line Help - Page 4 - JeepForum.com

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post #46 of 201 Old 07-03-2013, 11:42 AM
John Strenk
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1. Yes, try NAPA

2. Need to clarify terminology or we will get lost. .
That is called the Air Cleaner Housing. the intake is what the carb sits on that attaches to the engine head.
I bypassed the TVS when I hooked up my EGR. Never noticed much of a difference. Maybe it would work better in cold weather.

the hot air intake is to prevent carburetor icing on those cold but humid days when the dew point is low. It activates a vacuum motor on the air cleaner housing that will take air from around the hot exhaust manifold to keep the carb warm. That is what that 2" round aluminum tube you have showing in the picture.

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post #47 of 201 Old 07-03-2013, 11:49 AM Thread Starter
KnoxButler
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1) Awesome! Ill start getting ready to do that. Is it hard to replace the diaphragm?

2) I live in Arizona, it does get cold but not very humid. Idk ill leave that the way it is, as for the TVS I think im going to bypass it to insure that my EGR is working for the emissions test.
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post #48 of 201 Old 07-03-2013, 01:12 PM
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post #49 of 201 Old 07-03-2013, 01:17 PM Thread Starter
KnoxButler
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Ill do that! But first im in kinda a rush to get this jeep through emissions, just sold my DD and now need this one. Do you think it would adversely effect my emissions?
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post #50 of 201 Old 07-03-2013, 01:20 PM
LumpyGrits
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Quote:
Originally Posted by KnoxButler View Post
Ill do that! But first im in kinda a rush to get this jeep through emissions, just sold my DD and now need this one. Do you think it would adversely effect my emissions?
Yes
One thing is that you can fail smog if your ign. timing is off.
You can't get a 30 day extension on your reg?

LG
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post #51 of 201 Old 07-03-2013, 01:43 PM Thread Starter
KnoxButler
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No previous reg, just bought it, the timing seems fine. I can get a timing light from a friend, if the timing is right it wouldn't change right? As long as the advance is capped?
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post #52 of 201 Old 07-03-2013, 01:49 PM
LumpyGrits
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A capped advance port could/may/might be cause for a fail on a visual inspection.
LG
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post #53 of 201 Old 07-03-2013, 01:52 PM Thread Starter
KnoxButler
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Hypothetically if it didn't cause a fail on a visual inspection...
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post #54 of 201 Old 07-03-2013, 02:01 PM
LumpyGrits
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NOT hypothetical at all, as it would be cause for smog failure here in Ca.
You should ck with the testers in AZ before your next test.
LG
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post #55 of 201 Old 07-03-2013, 02:03 PM Thread Starter
KnoxButler
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LG I Understand that it might cause a visual inspection failure, I dont care about that right now what I want is for the Emissions to be below the standard. Once im there ill work from there..
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post #56 of 201 Old 07-03-2013, 02:15 PM
LumpyGrits
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Don't see how you could ever pass smog with a blocked advance.
In PRK, if you fail the visual, you fail, period.
Is it different in Az??
LG
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post #57 of 201 Old 07-03-2013, 02:21 PM Thread Starter
KnoxButler
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Yes, the inspectors are 16-18 years old and never worked on a car a day in there life. They open the hood and take a look as a formality not because they know what to look for.
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post #58 of 201 Old 07-03-2013, 02:30 PM
LumpyGrits
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Good luck then, and let's here back how it goes.
LG
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post #59 of 201 Old 07-03-2013, 04:28 PM Thread Starter
KnoxButler
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Update: So I took the Jeep into the Emissions test station for the second time. I passed the visual inspection even with the vacuum advance capped .
Everything had improved, like before I passed the loaded test. This time I also passed the idle co reading (much improved), however my HC reading raised on both idle and loaded.

Im going to do some research into what causes HC emissions, in the mean time if you all could offer any advice id love to hear it!
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post #60 of 201 Old 07-03-2013, 05:25 PM Thread Starter
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The only thing that I can think of that changed is that my mixture screws went from 5 turns out from seated to 2 3/4 on the second test.
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carter carb , cj7 , egr , emissions , vacuum

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