81 CJ CA Emissions Help - JeepForum.com
 
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post #1 of 11 Old 07-30-2021, 09:46 AM Thread Starter
toastabredz
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Cj 81 CJ CA Emissions Help

I bought a Jeep in Texas and am trying to get it approved for emissions in CA and got a checklist from the shop of things I need in order to pass. I have the original I6 258/4.2L but installed an HEI distributor instead of running the original setup. What I'm really struggling with is what the EGR valve connects to. In a diagram I found on AutoZone.com shows it connecting to the "EGR TVS" which then in turn connects to the "EGR CTO Valve" both of which I have no idea where those are.. I was hoping someone with CJ newer than 1980 has passed emissions with the I6 and has pictures they could share of how it all connects or can give me any tips. Thank you in advance!!

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post #2 of 11 Old 07-30-2021, 12:41 PM
Matt1981CJ7
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The EGR TVS is on the side of the air cleaner housing.

The EGR CTO valve is on the side of the intake manifold, not too far from the EGR valve.

Just like the diagram shows.

Matt
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post #3 of 11 Old 07-30-2021, 04:43 PM
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The site above will help you if your running all the stock stuff. Explains everything and is a really good resource.

That being said, I don't think there is an C.A.R.B. approved HEI. Lots of us in CA run them, but it can be hit and miss trying to get it smogged. I've personally never had anyone question mine, but ymmv.

I'm sure you're aware, but if not the easiest way to get pass the smog nazi's in CA is to run the Howell TBI...only C.A.R.B approved one around anymore that is still in production. I used to pass smog with my stock Carter but I always had my Jeep mechanic tune it all up and go through it before I'd ever bring it to a smog shop. After he moved to Montana (cause he was sick of CA) getting it tuned was a pain. One crack in a vacuum hose can cause you to fail lol...no fun at all.

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post #4 of 11 Old 08-01-2021, 07:48 AM
Bob95065
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I am going through this now. I have a 1980 CJ7 that I bought non op. I'm getting it ready for the smog test. My plan is to smog it with the carb then Drive if for a while to see what needs to be repaired on it. Eventually I'll convert it to a Howell TBI but I'll have to crush a bunch of cans to afford it.

I would start with the Factory Service Manual FSM. You can find a 1981 FSM here: https://oljeep.com/edge_parts_man.html

Just Friday I plumbed all my emissions equipment. Along the way most of it was bypassed. I'll post some pictures later today.

The CTO is mounted in the block below the intake and exhaust manifolds. The TVS s in the air filter housing. My Jeep has two. I looked for replacements and found they are NLA. Mine work I hope yours does too.

I replaced my ignition with an MSD box, distributor and coil which raised reliability and power and reduced wiring complexity. I found the MSD parts used. The PO eliminated the vacuum advance. I have a replacement on the way and once it's here and installed I'll be ready for smog.
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post #5 of 11 Old 08-01-2021, 05:54 PM
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Ok. I took some pictures today.

I have a 1980 CJ7 with thec258 6 cylinder engine. I took the carburetor put today to work on the choke. I snapped some pictures for you while I was in there.

These pictures are of the TVSs in the air cleaner. They are the two small black discs with 2 vacuum lines each.

20210801_154110_1627861404168.jpg

20210801_154107_1627861417405.jpg

My Jeep has two CTO valves that screw into the bkock on the left side below the manifolds. They are much easier to see with the air cleaner removed.

Front CTO:
20210801_154130_1627861505261.jpg

Rear CTO:

20210801_154139_1627861544468.jpg

They have vacuum hoses attached to them.

Front: https://www.carid.com/standard/porte...mpn-pvs71.html

Rear: https://www.carid.com/standard/porte...mpn-pvs14.html

I bought replacements for my Jeep from Rockauto but it's hard to paste links from there from my phone.

I hope this helps. Let me know if you need more info or photos.
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post #6 of 11 Old 08-01-2021, 05:58 PM
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My Jeep is much simpler that yours emissions wise. After looking at manuals from 1980 to 1986 to try and figure out wiring issues I found that someone put a harness from 1983 to 1986 on my 1980 Jeep. In the corse of reading the manuals it seems like the complexity of emissions components jumped in 1980 and rose steadily to 1986. Yours has more stuff than mine but less than later years. It isn't that bad if you follow each line methodically and restore the engine to the configuration in the FSM drawing.

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post #7 of 11 Old 08-01-2021, 06:08 PM
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I think those older manuals back in the 1800's even included how much oats to feed a Jeep back then, when shoes were needed or not, how to halter break them......interesting reading for sure
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My Jeep is much simpler that yours emissions wise. After looking at manuals from 1980 to 1896
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post #8 of 11 Old 08-01-2021, 07:52 PM
Bob95065
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Originally Posted by devildog80 View Post
I think those older manuals back in the 1800's even included how much oats to feed a Jeep back then, when shoes were needed or not, how to halter break them......interesting reading for sure
Haha typo edited.

I was on a forum years ago that had a frequent poster that had the best quote in his auto signature. It read "You can't believe everything you read on the internet". It was signed and dated Abraham Lincoln 1863

I am using an iPad I don't really like using because it has small keys and I have big fingers. Plus I don't type so good.
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post #9 of 11 Old 08-02-2021, 08:37 AM Thread Starter
toastabredz
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Thanks Bob so much for taking time out of your day to help me like this, it is so helpful!! Thanks everyone else for the comments!
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post #10 of 11 Old 08-02-2021, 10:13 AM
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Quote:
Originally Posted by Bob95065 View Post
Haha typo edited.

I was on a forum years ago that had a frequent poster that had the best quote in his auto signature. It read "You can't believe everything you read on the internet". It was signed and dated Abraham Lincoln 1863

I am using an iPad I don't really like using because it has small keys and I have big fingers. Plus I don't type so good.
I use an iPad also when i want to browse through post but it's hard to post pictures unless I take them with the camera or have them stored on the iPad.
You can get a bluetooth keypad for the iPad.

I have a couple of 1980 CTO's left on my spare 1980 engine. I think I have everything but the air cleaner housing.


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post #11 of 11 Old 08-02-2021, 07:54 PM
Bob95065
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Originally Posted by toastabredz View Post
Thanks Bob so much for taking time out of your day to help me like this, it is so helpful!! Thanks everyone else for the comments!
I'm glad you feel it helped. I feel your pain with CA emissions testing. I bought my Jeep the beginning of May and really didn't start working on it until June. I want to get it on the road before the rain starts.
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