HELP Emissions system delete for 83 Malibu 305 sbc

SwggMsthh

Not-quite-so-new-guy
Jun 11, 2022
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Hey y’all, does anyone know of any kits or tutorials to a full emissions system delete. I went to a good guys car show a few times now and noticed a lot of the carbureted engines didn’t look as cluttered as mine lol so I want to clean up and simplify my engine bay as well as making it more practical since they don’t do emissions testing on older vehicles here in Texas. A list of parts as well as detail steps would help! Thanx
 
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Clone TIE Pilot

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Galaxy far far away
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Bonnewagon

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There are about a zillion threads about that here. The thing to know is that under all the CCC crap is still a basic engine. But you can't half-step it. Everything must be removed, and replaced with pre-CCC hardware. Carburetor, distributor, everything. If you are skilled at setting up a carb and dizzy, have at it. Otherwise don't waste your time. There are almost as many threads about 'I yanked all the emssions junk and now my car runs like crap'.
 
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g0thiac

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Sep 6, 2020
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There are about a zillion threads about that here. The thing to know is that under all the CCC crap is still a basic engine. But you can't half-step it. Everything must be removed, and replaced with pre-CCC hardware. Carburetor, distributor, everything. If you are skilled at setting up a carb and dizzy, have at it. Otherwise don't waste your time. There are almost as many threads about 'I yanked all the emssions junk and now my car runs like crap'.
I disagree, the AIR pump, EGR valve and other emissions devices were removed from my 1988 Caprice when I bought it.

And they retained CCC, and if you want videos I can show you it idling so gentle, you would think someone had swapped the LG4 but it was the same one.

Now, HOW they did it. I am not sure because I noticed there was some wiring done. But it only ever threw a code, when the thermostat sensor was disconnected.
 
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g0thiac

G-Body Guru
Sep 6, 2020
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Hey y’all, does anyone know of any kits or tutorials to a full emissions system delete. I went to a good guys car show a few times now and noticed a lot of the carbureted engines didn’t look as cluttered as mine lol so I want to clean up and simplify my engine bay as well as making it more practical since they don’t do emissions testing on older vehicles here in Texas. A list of parts as well as detail steps would help! Thanx
You can.

Heres the facts, keep in mind.

1. If you live in a place, or visit any that checks for emissions?

Don't do it. Because these cars, do stand out and not every cop is going to like your ride also lol.

2. If you do, keep the parts. Things like the old AIR pumps, might not mean much to guys like us- but for people living in places that need a yearly look by a mechanic?

Sell it, because they for some reason have never reman ones from what I have heard.

3. You need to have it deleted right. I am honestly questioning some of the posters here, as you can retain the original CCC system, my Caprice had it and threw no codes.

If I can get in touch, with my old mechanic who owned the car in Ottawa for nearly 2 full decades he might be able to tell me, what was done 😤💪

Because I know they changed some wires in the harness, but I have no idea to be honest what had been done either 🤔😂😂😂
 

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Bonnewagon

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a full emissions system delete.
The OP wants to get rid of it all. The only way to do that is to strip it down to the basic engine and re-build from there. I have done it, it isn't hard. But you need everything that a pre-emissions engine used and some of that is getting pretty hard to find. If you notice on Fleabay every Q-jet is now a Ram Air Trans Am carb and they want a king's ransom for it.
:blam:
 
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SwggMsthh

Not-quite-so-new-guy
Jun 11, 2022
26
22
3
The OP wants to get rid of it all. The only way to do that is to strip it down to the basic engine and re-build from there. I have done it, it isn't hard. But you need everything that a pre-emissions engine used and some of that is getting pretty hard to find. If you notice on Fleabay every Q-jet is now a Ram Air Trans Am carb and they want a king's ransom for it.
:blam:
Strip it down completely? What parts could I leave on the block I know the air pump would have to go which would require different belt arrangements.
 

Bonnewagon

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You want it car show pretty right? The carburetor, the distributor, smog pump, EGR valve, AIR tubes that go into the exhaust manifolds if you have those. The intake manifold has a few sensors that are not needed. Replacing the manifold with a pre-emissions or aftermarket unit will eliminate the EGR and all sensors and they usually have a spot for a water temperature sensor on the water crossover. Nice chrome valve covers, chrome air cleaner, and whatever dress-up parts you want to invest in. But like I said, if you go this route you need to be knowledgeable in carburetors, distributors and how to time and tune an engine. You can't just grab whatever is on sale at Summit and expect it to run great. Eliminating the fugly EGR valve means you must use less timing because the dilution effect of EGR lets the engine run more timing without detonating. A non-CCC mechanical/vacuum advance distributor needs to be set up with a proper advance curve. I guess what I am saying is, I agree with the guys who say DON'T DO IT because the entire CCC system is designed to work as a team to let the engine run at it's best while getting good mileage and low emissions. Just deleting stuff without going all the way is a tough road unless you know all about the stuff I mentioned.
 
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SwggMsthh

Not-quite-so-new-guy
Jun 11, 2022
26
22
3
You want it car show pretty right? The carburetor, the distributor, smog pump, EGR valve, AIR tubes that go into the exhaust manifolds if you have those. The intake manifold has a few sensors that are not needed. Replacing the manifold with a pre-emissions or aftermarket unit will eliminate the EGR and all sensors and they usually have a spot for a water temperature sensor on the water crossover. Nice chrome valve covers, chrome air cleaner, and whatever dress-up parts you want to invest in. But like I said, if you go this route you need to be knowledgeable in carburetors, distributors and how to time and tune an engine. You can't just grab whatever is on sale at Summit and expect it to run great. Eliminating the fugly EGR valve means you must use less timing because the dilution effect of EGR lets the engine run more timing without detonating. A non-CCC mechanical/vacuum advance distributor needs to be set up with a proper advance curve. I guess what I am saying is, I agree with the guys who say DON'T DO IT because the entire CCC system is designed to work as a team to let the engine run at it's best while getting good mileage and low emissions. Just deleting stuff without going all the way is a tough road unless you know all about the stuff I mentioned.
Gotcha. Thank you for the details! I’ll be taking this into serious consideration.
 
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