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"86 Smog Delete

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Old Sep 7, 2019 | 04:01 PM
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Default "86 Smog Delete

New to the forum looking for some advice. Since my car is no longer needing to be smog checked I'm looking at deleting a few items. Suggestions? I'll leave the cats. Depending on what I take off is how I'll have the prom chip programed. Thanks
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Old Sep 7, 2019 | 04:48 PM
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AIR system
EVAP system

Previous owner eliminated the EGR piping and the cats.

No tuning necessary.

Last edited by PacerX; Sep 7, 2019 at 04:49 PM.
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Old Sep 7, 2019 | 06:20 PM
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No trouble codes afterwards?
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Old Sep 7, 2019 | 09:07 PM
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Originally Posted by Cgaffman
No trouble codes afterwards?
Nope.

My PCM is happy as a clam.
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Old Sep 7, 2019 | 09:21 PM
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Only possible "code" source is the EGR system as the ECM does check it on startup and calls for it when at steady speed with coolant temp >~170deg. F.
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Old Sep 7, 2019 | 10:43 PM
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Originally Posted by 65Z01
Only possible "code" source is the EGR system as the ECM does check it on startup and calls for it when at steady speed with coolant temp >~170deg. F.

Yep.


To the OP:
I'm finishing a write up on how to delete the EVAC system. There's no power to be found doing that, but you get a few things out of it:

1. Removal of possible sources of vacuum leaks.
2. A whole bunch of space beneath the left headlamp gets freed up. Nice place for some other stuff to go when my mods progress.
3. A minor weight reduction.


Pulling the AIR system really does a few things for you too...
1. More possible vacuum leaks gone.
2. Frees up space.
3. Makes the car MUCH easier to work on around the plugs and front of the engine. Also, ever heard about the "pull the windshield wiper motor to get the valve covers off" nonsense? Delete the AIR system and that's no longer the case.
4. Cleans up the engine bay a lot.
5. A more significant weight reduction.

Here's what a deleted AIR system and throttle body bypass looks like:



Last edited by PacerX; Sep 7, 2019 at 10:59 PM.
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Old Sep 9, 2019 | 03:13 PM
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Default Parts

What all parts did you remove? Where did you find the bronze colored caps for the air tubes? Thanks
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Old Sep 9, 2019 | 11:09 PM
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Originally Posted by Cgaffman
What all parts did you remove? Where did you find the bronze colored caps for the air tubes? Thanks
1. I deleted the entire AIR system apart from the risers off the exhaust manifolds, plus the entire EVAP system and did the throttle body bypass. The prior owner deleted the cats and blocked off the EGR.

2. Got the bronze colored fittings at Lowe's.

I'll get to finishing the EVAP delete write-up sometime this week.

Last edited by PacerX; Sep 9, 2019 at 11:10 PM.
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Old Sep 9, 2019 | 11:46 PM
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Thanks for the info. I'll start this project after I return from a 2 week motorcycle trip
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Old Sep 10, 2019 | 03:48 PM
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AIR removal only really entails yanking it off and fitting a pipe plug over the pipes into the headers. No codes could set from that.

EGR removal, yes its possible to get a Code 32. When I yanked mine off, I simply cut the wire to the solenoid and yanked the pipe off, and put in a blockoff plate on the intake manifold. Headers I installed at the same time had no port on their manifold. I never got a code unless I was cruising on the highway for a long period of time, and then I ignored it. Never had other effects.
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Old Sep 10, 2019 | 06:53 PM
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Thanks
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