This is what your AIR injection system looks like

[KagA152]

your car looks familiar

anyways, do you have the stock exhaust manifolds? if so, you will need to plug the holes when you remove the lines. otherwise, theres no problems

[ShiftyCapone]

Some TPI applications have the AIR incorperated into the PROM and it can cause problems if removed. I would look into that on the exhaust board. It is fail safe if you have TBI.

[Red1991TransAm]

I was more asking for my 82. It has had the cat cut off and replaced with a pipe So when I read this post.. I was just curious.

And yes.. that car does look familiar I pick mine up from the body shop tonight.. will get some pics asap! Going to have my wife make me a sig pic.. can't wait!

[Jetmeck]

Originally posted by 25THRSS
gmpartsdirect.com I can't remember the part # right now, but do a search for smog pump delete pulley. I wanna say it's 10186167, but it's been a while now.

Is this part number for 88-92 L98's ? I have seen part number 10129569 also in a few threads which is supposed to be a delete pulley also ? According to gm parts direct is a belt tensioner ? I am going to run the pump delete pulley, it looks like something is missing without it.

Bottom line, 10186167 work for 88-92 L98's ?

Thanks,

Bill E.

[25THRSS]

Originally posted by Jetmeck
Is this part number for 88-92 L98's ? I have seen part number 10129569 also in a few threads which is supposed to be a delete pulley also ? According to gm parts direct is a belt tensioner ? I am going to run the pump delete pulley, it looks like something is missing without it.

Bottom line, 10186167 work for 88-92 L98's ?

Yes, it will work for all serpentine equipped third gens, which were 88-92. 10186167 is the correct part number, but don't pay any attention to gmpartsdirect's description. IIRC it was listed as a water pump pulley when I bought it, lol. Here is some more info.

http://thirdgen.org/techbb2/showthre...ht=%2B10186167

[Jetmeck]

Originally posted by ShiftyCapone
Some TPI applications have the AIR incorperated into the PROM and it can cause problems if removed. I would look into that on the exhaust board. It is fail safe if you have TBI.

On TPI has anyone heard of any problems disconnecting and removing all the air pump system WITHOUT doing anything to the computer.???????
thx

Bill E.

[85z28guy]

I just removed mine today, simple, and I needed to replace a lower rad hose so I was there anyways. I didn't need a delete or anything, it was running on its own belt. If you do it though take off your emmison sticker under the hood. Around here if you get caught with the pump off its over a $300 ticket.

[bonacci1]

This is a 305 TPI for an 87 Z28 can someone tell me what goes here in this area. I will be adding 3 more pics following this one. This item is right above the air pump

[bonacci1]

what goes from here to here?

[bonacci1]

Another pic.

Any help will be appreciated

[vbMike]

bonacci1
In the picture you show there should be a rubber hose that goes from that diverter box and then connects to a check valve that screws onto the metal pipe back by the firewall. This is the air connection to the CAT.

[sully91rs]

Originally posted by ShiftyCapone
You would hear a wistling sound at speeds and have an exhaust leak at idle.

At idle, my car does have some strong odors. Also, when I rev it, it makes a whistling noise, so much that friends thing I have a turbo in it.

I've been told the whistling has something to do with the belt, although it is a whistle, not a squeak.
From what Shifty says, it seems like its something to do with my AIR to Cat.

Sound familiar to anyone?

[Azrael91966669]

correct belt routeing if you have power steering

http://www.thirdgen.org/techboard/pr...h-article.html (smog pump Tech Article)

[killa_b]

what could be used to plug the manifold where the pipes thread in for the smog lines?

[Jetmeck]

Originally Posted by killa_b

what could be used to plug the manifold where the pipes thread in for the smog lines?

Plugs, do a search for the correct thread size and type.

[keys2heaven]

Originally Posted by 86BirdSE

If you've ever hooked up a scan tool to your ecm, the air pump switches on and off from time to time. The stock ECM is calibrated to compensate for the injected air by adding a fixed number to the current oxygen sensor reading, which may or may not cause a leaning or richening situation that goes undetected.

Also, do not gut your catalytic converter and keep your air pump intact. You will get horrid popping noises from your exhaust. Well, I don't think it's cool... some others here might though ;-)

Bought my '89 TA from a nieghbor of mine. He cut out the cats, but let the AIR system in tact. I get the "popping" sound, especially when I left off the gas and deccelerate.

How hard is it to remove the AIR system and disable those features? Do I need to purchase a chip?

[killa_b]

that popping isnt because theres no cat atleast my l03 doesnt misfire with no cat

[OneMeanLG4]

I took old lug nuts and stuffed them in the hoses. Worked well, plus they were chrome, lol. I took out the smog pump, valve and most hoses, and plugged them all up, then the camaro wouldn't start the next morning. Thats when the plugs fouled up so it was a coincidence. Does removing te air sytems put that much of a strain on the cats? X Emissions + Y ammount = still X emissions plus some air. It really doesn't reduce the tail pipe emissions. Dilutes them, but doesn't reduce.

[Douchermann]

Originally Posted by OneMeanLG4

It really doesn't reduce the tail pipe emissions. Dilutes them, but doesn't reduce.

That's not true, it's a whole heapin helpin of chemistry going on in the cats.

In complete combustion, the engine produces only water and carbon dioxide (which is what we breath out). However, there is rarely "complete" combustion, there are always leftovers. These include nitrogen oxides (dioxide and monoxide), carbon monoxide, and any unburnt fuel.

Unburnt fuel wont turn into carbon dioxide and water (like it's supposed to) if you just stare at it. It needs something to make the oxygen in the air to react with it. There is where the catalytic converter comes in. Platinum catalysts (research catalysts for more info) cause the unburnt fuel and carbon monoxide to react with the remaining oxygen.

Below is a combustion equation of Octane reacting with oxygen.

2C8H18 + 24O2 ----> 16CO2 + 18H2O
and below is a reaction of CO + O2
2CO + O2 ----> 2CO2

So you can see how the catalytic converter works when enough of the reactants are present, but what if the engine is running rich and consumes all of the available oxygen?
This is where the AIR system comes in. It kicks on to give the catalytic converter that extra boost of oxygen when it needs it, such as warm up enrichment when the car runs rich to warm it up.
----------------------------------

Another point is the popping noises from hollowing out your cats. This happens because unburnt fuel (that is normally consumed by the cats) pools up in the cat casing. When you decelerate, the engines puts in a whole lot less fuel and pumps some extra oxygen through, which combined with the hot gasses, causes the fuel to auto-ignite, thus POP. This especially happens with the air system connected to hollowed out cats.

[vorgath]

So does that mean one would have more problems with passing smog if one ran two cat converters rather than just one ?

[Cratemaster]

i've got an '84 2.8 and it's got a seperate belt for each accessory, a few of them also power the alternator, but this makes it easy to do an A.I.R. delete. In this small of an engine (and with all it's stock parts) the delete caused no noticable power gain. I bought the maro from a friend who cut the AIR belt off, he "forgot" to get it smogged before he sold it to me, so I had to reconfigure the engine for smog i.e. remove valve cover breathers and replace vacuum lines and such, and replace the smog pump belt. Now I have no incentive to cut the smog pump belt again, I don't want to have a failed cat, ya know what I mean, maybe on the v8's it's worth it, but not a stock 2.8

[SLP_GTA]

[Douchermann]

Originally Posted by vorgath

So does that mean one would have more problems with passing smog if one ran two cat converters rather than just one ?

Nope, they merely function as one, but one per four cylinders. Less emmissions, better flow. The EPA was happy, you're happy, it was a good option lol. The manufacturer option dual cats was two cats in parallel. Some cars come with two in series though. For those cars, the second one just picks up the slack of the first.

[jordo2114]

alright guys this may sound stupid but what if you took everything off but the pump and routed hose or something to make like a mini forced induction or would it not flow near enough air you could always run a hose from it to the tpi plenum where the coolant lines go in and have it blow air through there to cool it lol sounds stupid i know

[master_disaster]

wouldnt cause a difference because forced induction changes the atmospheric pressure...if your smog pump does that you got problems, not only that but those hoses get HOT not cold, so blowing hot air into your plenum would defeat the purpose of the entire idea

[jordo2114]

dang thought i was on to somethin lol haha

[t/agta]

I took all the stuff off for my header, but now i cant pass emissions or inspection. Would i be able to put the pump and diverter valve back on, plug the outlet on the diverter that would go to the manifolds, and run only the tube to the cat? would that work? if not i'm pretty much screwed