Author Topic: Removing emissions  (Read 9850 times)

Offline 86 C-10 305 Guy

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Removing emissions
« on: May 25, 2020, 02:22:40 PM »
1986 Chevy C-10 Scottsdale 305 V8 Single Cab, Automatic w/overdrive.

Does anyone have a step by step (preferably with pictures) process on removing the emissions from my truck to mainly cleanup under the hood?

Recently got the truck and started trying to work on it (amateur) took the Quadrajet carb out and swapped it with an Edelbrock 1906, since the Quadrajet wasn’t working anymore. New open air filter as well. I’m just trying to hook everything up correctly. Thank you in advance.


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Offline VileZambonie

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Re: Removing emissions
« Reply #1 on: May 25, 2020, 06:36:52 PM »
The first thing to do is take plenty of pictures and inventory everything you take off. You'll want to retain all of the parts for the next owner or for resale. Leave the vapor canister and hook it up. Pretty much everything else is up for removal
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Offline 86 C-10 305 Guy

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Re: Removing emissions
« Reply #2 on: May 25, 2020, 08:18:42 PM »
Is there a step by step process? I’m definitely an amateur when it comes to cars. That’s why I got this one to learn and fix up.


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Offline VileZambonie

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Re: Removing emissions
« Reply #3 on: May 26, 2020, 06:35:46 AM »
Well I hate to say just start ripping everything out when there is no plan in place. Are you upgrading parts, because if you are just removing the components that are there, the truck becomes more molested and loses resale value? If you are doing performance upgrades and not butchering up the harness and components along the way essentially everything can be deleted. Are you changing the intake manifold?



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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 86 C-10 305 Guy

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Re: Removing emissions
« Reply #4 on: May 26, 2020, 09:01:20 AM »
Should I change it? After doing some checks in think the head gasket is blown.


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Offline 86 C-10 305 Guy

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Re: Removing emissions
« Reply #5 on: May 26, 2020, 10:50:27 AM »
Do you know what this is or what this does? It’s between the distributor and the carburetor. With the red and blue caps.


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Offline zieg85

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Re: Removing emissions
« Reply #6 on: May 26, 2020, 11:05:22 AM »
That is for full manifold vacuum.
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline zieg85

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Re: Removing emissions
« Reply #7 on: May 26, 2020, 11:07:36 AM »
That switch on the firewall is for your lock up torque converter.  It needs vacuum.
« Last Edit: May 26, 2020, 11:10:10 AM by zieg85 »
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline 86 C-10 305 Guy

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Re: Removing emissions
« Reply #8 on: May 26, 2020, 11:59:29 AM »
That switch on the firewall is for your lock up torque converter.  It needs vacuum.
Where does the lock up torque converter connect to? To the carburetor?


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Offline 86 C-10 305 Guy

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Re: Removing emissions
« Reply #9 on: May 26, 2020, 12:00:00 PM »
That is for full manifold vacuum.
Do I need full manifold vacuum?


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Offline zieg85

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Re: Removing emissions
« Reply #10 on: May 26, 2020, 01:18:42 PM »
That switch on the firewall is for your lock up torque converter.  It needs vacuum.
Where does the lock up torque converter connect to? To the carburetor?


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I would consult the vacuum line diagram on your core support if you still have one.  None of my trucks have that switch because of different transmissions than yours
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline VileZambonie

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Re: Removing emissions
« Reply #11 on: May 26, 2020, 05:05:33 PM »
That switch is the tip-in vacuum switch. The TCC switch is closer to the booster
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline zieg85

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Re: Removing emissions
« Reply #12 on: May 26, 2020, 06:20:09 PM »
That switch is the tip-in vacuum switch. The TCC switch is closer to the booster

My bad, I thought differently.  Thanks for the education
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline VileZambonie

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Re: Removing emissions
« Reply #13 on: May 27, 2020, 08:29:20 AM »
They look similar and are easy to mix up. The tip-in switch is closer to the distributor while the low vacuum switch is closer to the trans harness.
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              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 86 C-10 305 Guy

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Re: Removing emissions
« Reply #14 on: May 27, 2020, 01:43:09 PM »
How hard would it be to replace the head gasket?


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