Emissions Removal

Keep · 08-09-2003, 12:54 PM

Helly everyone, I am new to this board.

My question is as follows: I have a 1986 K5 Blazer with the 5.0L 305 4bbl.

I would like to remove all the emissions equipment from the engine. (such as the air pump, air injection lines, vaccuum lines, catalyst, EGR system).
(Note: I have aftermarket exaust, with not cat or O2 sensors, and still awaiting headers which do not use Air injection)

Is there any site where I can find step by steps with illustrations.
Also, some advice on the subject, realting to issues such as what shouldnt be removed, and what might need to be tuned after such a project.

Thanx in advance

Keep · 08-10-2003, 08:31 PM

Anybody??

Rob_0126 · 08-17-2003, 06:16 PM

Removing emmissions equipment is illegal, so you probably won't get an answer.

If your engine is EFI, theirs not much you can do, because the computer relys on those components to run the engine.

If you go carb, then that would be different.

Robert

Keep · 08-17-2003, 09:01 PM

I live in Alberta, Canada.
Everything goes up here, no laws about emissions, no *sniffer tests*, nothing of the sort.

I am carburated, and am curious as to which vaccuum lines are safe to remove, and which ones I must re-route or leave on (such as the EGR and PCV lines)

Thanx for your reply

Rob_0126 · 08-18-2003, 03:54 PM

It really depends on what all is hooked up, and the options that came from the factory.

Take my 79 el camino for an example:

I pulled off the egr valve, and capped it off with a plate.

My engine has vacuum advance, so that is important to keep connected.(A hose that runs from the carb to the distributor)

The carbon canister doesn't work on my car, and the hose that comes from the gas tank, to blow off fumes(I guess), isn't connected to it.

Im not sure if your truck has an air pump, and to tell you the truth, Im not sure what their used for.

Not sure if you can disconnect that.

The heater stove that surrounds one of the exhaust manifolds can come off. There should be a hose that runs from the breather, to the manifold, into the heater stove.(Now in the winter, it will be a pain to get a good start in the morning, and might end up with carb icing, but I deal with it, cause it makes the engine look cleaner, and makes the plugs easier to get to.)

If you have cruise control, and you dont need it, pull it off. Their should be a bracket that is held down by an intake bolt(which you might just want to leave on because you will need to retighten the bolt, to specs)

There is a few hoses that run off direct engine vacuum, and they should come out from behind the carb, on the intake. These should be left alone as they are used!

If you can think of any other thing that looks like emmissions, shoot!

Robert

Keep · 08-18-2003, 07:50 PM

I've already removed the air pump (it is mainly used for the air injection into the exaust manifolds, basically making the exaust burn more completely in the pipe...leading to better emissions)
I've also removed the pre-heated assembly, mainfly because I have have aftermarket headers.

What I will do is work on that EGR valve, and get rid of the catalyst (and all its lines).
As for leaving the vacuum advance on, and the intake/carb lines on, I will do as you explain (leave them be).

Robert, thank you very much, I really apreciate your advice.

(btw, in the pic, i removed all the emissions stuff, thats why there's no lines to the carb/distributor/water neck..etc..)

Rob_0126 · 08-18-2003, 08:09 PM

Glade to help.

Napa probably caries the egr capper plate. Can't remember the technical word for it.

I had to use the capper, because the edelbrock carb would not sit completely down on the intake.

Looks like you might have cruise control. Keep it if you want it, or not.

I like cruise control myself.

The hose from the carb to the dist. is the vac. advance hose, and is highly recommended that you keep it connected.

As for the back stems behind the carb, on the intake, it really depends on what is using the engines vacuum.

I have a few capped off on mine, but I do have one running to(I think) the heater/ac module inside the vehicle. I think those ran off vacuum.
(best way to find out if your engine needs one of those hoses, is to crank it up, and pull one off the engine vacuum.

As for the brake booster, that hooks into the back of the carb, leave that baby on.

Nice headers.

man, that alternator looks like it's seen better days.

Nice setup

Robert

Keep · 08-18-2003, 10:14 PM

lol, got that right!
I'll pick up an alternator one day.

If you wanna see more of the K5, my site is http://members.cardomain.com/keepsta

Now........i can finally start the job..

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