smog pump removal

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08-19-2002, 01:30 AM

CtRw

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Join Date: Nov 2001

Location: North Dakota

Posts: 101

smog pump removal

Hey guys,
Heres the plan: When it comes time to change my belt, which will be soon, I want to take the smog pump off this beast. Any there any holes that will need to be plugged and if so, what would be the best way to plug them? I've heard the computer doesn't even care once it's gone anyway.

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1983 Z-28
305 LU5 V8(Cross-fire Injection)
Radical Cam
Limited Slip Differential w/
3.23 Gears
700R4
T-Tops
Pics-- http://www14.brinkster.com/ctrwsz28/

08-19-2002, 09:09 AM

1989gta

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Join Date: Feb 2001

Location: burnsville, mn

Posts: 158

you getting an egr plat?
also the converter has a tube coming from it.

08-19-2002, 11:41 AM

aklim

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Join Date: Mar 2001

Posts: 3,249

I'm pretty sure the computer will know that the EGR is gone. For that, you will have to blank out Code 32 in your EPROM.

You will have to remove the tube going to the cat and plug up that hole. After that, remove all the hoses coming from the pump. Take the valves off the AIR pipes and plug them. Zip tie the wires that go to the AIR valve and you are done.

08-19-2002, 02:25 PM

kandied91z

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Join Date: Nov 2000

Location: MI

Posts: 3,978

not sure on the difference between years; but on mine i just left the belt alone and added a delete pulley.......upgraded to headers and zipped off the lines. works perfect. good luck

08-19-2002, 02:58 PM

oliracing

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Join Date: Jul 2001

Location: Flat Rock, Alabama, USA

Posts: 5

Where might one pick up a delete pulley? Say for a car with the serpentine system?

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94 Bright Teal Z28 M6, K&N, MSD 6A, TES, Borla, 52mm TB, Lingenfelter ported intake, Hurst, HPP, and BFG Radials,
1986 Iroc
1985 Iroc (Resto)
1990 Iroc (G92 hardtop w/ 5-speed)

08-19-2002, 06:39 PM

CtRw

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Join Date: Nov 2001

Location: North Dakota

Posts: 101

the question: you are gettin an egr plate? Well, I'm assuming I will need that to put over the hole. Delete pully? How's all that work? Leave the pump? Sorry for all the questions! Thanks guys.

------------------
1983 Z-28
305 LU5 V8(Cross-fire Injection)
Radical Cam
Limited Slip Differential w/
3.23 Gears
700R4
T-Tops
Pics-- http://www14.brinkster.com/ctrwsz28/

08-19-2002, 07:43 PM

90rsMustangkiller

Registered User

Join Date: Oct 2001

Location: Boston, Ma

Posts: 12

go to thirdgen.org they have a tech section on this you dont need a pully delete just a shorter belt

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90 rs 305 tbi, Crane cam, comp roller rockers, vortec heads/high rise intake, Ported, TBI w/350 injectors, and all tbi goddies, custom computer chip, tpi computer, 700r4 rebuilt w/shift kit, b&M megashifter, K&N 14x4 open element, 4 3/4" cowl hood, Edelbrock TES headers, flowmasters, 3.23 posi 383 in the works/ B&M th400 trans

08-19-2002, 09:38 PM

amc91z

Registered User

Join Date: May 2002

Location: Amarillo, TX

Posts: 332

I took my smog pump off and gutted it and put it back on...been going great for about 2 years now

Adam

------------------
White 91 Z-28:
Currntly a 305 TPI w/auto car.
Mods:
Comp Cam, ported plenum and runners, AFPR, air foil, 4.11 gears, Hedman Hedders, and a few other goodies

...soon to have an LS1 and 6-speed!!!

08-20-2002, 11:37 AM

oliracing

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Join Date: Jul 2001

Location: Flat Rock, Alabama, USA

Posts: 5

Thanks guys!!

08-21-2002, 12:33 AM

#10

CtRw

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Thread Starter

Join Date: Nov 2001

Location: North Dakota

Posts: 101

Amc, did gutting it help your performance as much as taking it off would?

08-21-2002, 04:24 PM

#11

amc91z

Registered User

Join Date: May 2002

Location: Amarillo, TX

Posts: 332

When we gutted it, it had no resistance. You could spin it and it would spin freely.
Adam

------------------
White 91 Z-28:
Currntly a 305 TPI w/auto car.
Mods:
Comp Cam, ported plenum and runners, AFPR, air foil, 4.11 gears, Hedman Hedders, and a few other goodies

...soon to have an LS1 and 6-speed!!!

08-21-2002, 04:56 PM

#12

Z28Honda-eater

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Join Date: Aug 2002

Location: Warner Robins, Ga

Posts: 1

Hey -- i want to pull the entire smog system out -- already put a shorter belt on but my question is if i pull the hardware out will it screw up my TPI computer?? isnt there some feedback from it to the brain??

08-22-2002, 11:14 PM

#13

amc91z

Registered User

Join Date: May 2002

Location: Amarillo, TX

Posts: 332

I've either removed or gutted the smog pumps on all my camaros I've owned and it has never caused a service engine light to come...ie no trouble codes...

------------------
White 91 Z-28:
Currntly a 305 TPI w/auto car.
Mods:
Comp Cam, ported plenum and runners, AFPR, air foil, 4.11 gears, Hedman Hedders, and a few other goodies

...soon to have an LS1 and 6-speed!!!

08-23-2002, 01:31 AM

#14

aklim

Banned

Join Date: Mar 2001

Posts: 3,249

Quote:

<font face="Verdana, Arial" size="2">Originally posted by Z28Honda-eater:
Hey -- i want to pull the entire smog system out -- already put a shorter belt on but my question is if i pull the hardware out will it screw up my TPI computer?? isnt there some feedback from it to the brain??</font>

EGR will cause an error code unless you fix the EPROM. AIR system is controlled by the computer but does not cause problems. If I am not mistaken, the AIR Divert Solenoid diverts air to the AIR tubes on the manifold or headers only when it is cold. Rest of the time it goes to the cat. When it is cold, the ECM is in closed loop and disregards the O2 so it won't notice that no fresh air is going to the manifold which is before the O2 sensor going down from the exhaust manifold or header.