Can you tell me if I'm missing something.

[oregonmon]

Third attempt at passing smog and no go. My CO is around 2.5 (max is 1) and hydrocarbons are around 625 (max is 200).

PO has removed the smog/air pump but it seems everything else is there, but I'm not sure.

Here's a couple of not so good photos in hopes you guys could tell me if I'm missing something. A fellow pelican has a pump but would rather not have him ship everything just the pump if I don't have to.

Could we make a checklist?

The metal piping underneath the engine seems to be there.


Left side of engine bay.

[oregonmon]

FYI
New injectors, plugs, wires, cap, a bunch of Techron through the tank, the timing, air/fuel has been adjusted. Wondering if a low rpm bucking is related to unburnt fuel.

Could my 30 year old cat not be doing it's job? Another pelican has a later 60k mile 3.2 Carrera cat for a decent price, thinking about putting that on. Hoping that and a pump if I have to will get it passed.

Also is the pump easy to put back on? According to 101 projects I'm about a 2-3 little wrench guy level.
Thanks.

[tcar]

How did it fail? CO? What?

If you have the numbers, that would help.

Is the Techron out of the system?

Here you would fail the visual because of no pump.

[oregonmon]

Techron out. See my first post for numbers. Also, just changed the oil and cleaned K&N air filter.

[McLovin]

Yeah, you're missing the smog pump.

Your car has a 2 way cat, not the 3 way cat of the 80 and up 911s. With the 2 way cat, you need the smog pump to pass smog.

When I had my SC, I ran it on a gas analyzer with and without the pump (pump disconnected) to see the difference. It easily passed with the pump, but would NOT pass without it, not even close.

[McLovin]

looking at your pictures, it looks like only the pump was removed, so if you have the pump and the brackets it hopefully will be a straight bolt up.

if you do that, remember there is a vacuum line that runs to the smog pump from somewhere on/near the throttle body. You must have that vacuum line in place for the system to work.

[boyt911sc]

Originally Posted by McLovin

Yeah, you're missing the smog pump.

Your car has a 2 way cat, not the 3 way cat of the 80 and up 911s. With the 2 way cat, you need the smog pump to pass smog.

When I had my SC, I ran it on a gas analyzer with and without the pump (pump disconnected) to see the difference. It easily passed with the pump, but would NOT pass without it, not even close.

Oregonmom,

I haven't heard anything from you since your last email. I have a complete set you can have (FREE). Just take care of the shipping costs via FedEx and I'll have them out ASAP. Make-up your mind before someone grabs them away.

Tony

[oregonmon]

McLovin that's good to know that it wouldn't pass without the pump.
Boyt911, you are my next contact. It seems that I won't need the plumbing but I will need the pump and brackets.
Let me know the cost. Gonna pm you with address, thanks for sticking with me.

[Steeve]

How long do you have to pass smog inspections? Ours stops at 25 years, so I get to do a little happy dance next year.

[oregonmon]

I wish. Tree huggers up here in Portland Metro area make it 35 years!
But that's the thing, I normally run cat bypass and no pump. I don't want to have to spend money on this considering I need to pass 2 tests in 4 years than I'm exempt.

[boyt911sc]

Ryan,

I went out to my tool shed and pulled out the crate containing the SC air pumps. The picture below shows the different accessories that come with the air pump unit. Do you need all these parts with the pump? If I have to install one on my car today, I'll select the dirty looking air pump on the right (smoother rotation of the pulley). They were good working pumps when I tested them on my car several years ago as spare units. So which one do you want? The one on the left or the right.

BTW, last time I tried to help someone in the forum, I got crucified. So I'm not giving any warranty on these free stuff. All I could say is these were my spare units for my SC when I was running with air pump in the car. These were purchased in the mid 90's before the conception of Hershey Swap Meet.



I think I also have a new belt somewhere. If I locate it, I'll throw that in the box too.

Tony

[HarryD]

Originally Posted by oregonmon

I wish. Tree huggers up here in Portland Metro area make it 35 years!
But that's the thing, I normally run cat bypass and no pump. I don't want to have to spend money on this considering I need to pass 2 tests in 4 years than I'm exempt.

Ryan,


Bad news, there is no "rolling exemption". All car '75 and newer must be tested. Period.

[80-911SC]

be happy yours stops at 35, just a bit south of you they put a cap on the smog, 1974 and newer cars and trucks still need to pass smog here .... dont they realize co2 is good for trees ?????????

[my1st911]

Your car is running to rich. Adjust your CO through the small hole with a 3 mm allen

[oregonmon]

Originally Posted by my1st911

Your car is running to rich. Adjust your CO through the small hole with a 3 mm allen

Can I safely lean it out enough, to pass though. I've never adjusted this before.

[oregonmon]

Originally Posted by boyt911sc

Ryan,

I went out to my tool shed and pulled out the crate containing the SC air pumps. The picture below shows the different accessories that come with the air pump unit. Do you need all these parts with the pump? If I have to install one on my car today, I'll select the dirty looking air pump on the right (smoother rotation of the pulley). They were good working pumps when I tested them on my car several years ago as spare units. So which one do you want? The one on the left or the right.

BTW, last time I tried to help someone in the forum, I got crucified. So I'm not giving any warranty on these free stuff. All I could say is these were my spare units for my SC when I was running with air pump in the car. These were purchased in the mid 90's before the conception of Hershey Swap Meet.



I think I also have a new belt somewhere. If I locate it, I'll throw that in the box too.

Tony

Tony, you seem like heck of a guy and I appreciate what you're offering. I will not hold you liable for free parts. I guess I will take the pump you believe is in best working condition. I don't seem to have the bracket but I'm not sure about the other pieces. I guess I'll take the extra parts just in case. Yeah, belt I wonder if Pelican sells them in case you don't have one.
Thanks again, I'm hoping this will pass me. How difficult is this to put back on?

[my1st911]

Originally Posted by oregonmon

Can I safely lean it out enough, to pass though. I've never adjusted this before.

You have plenty of room to lean it out. You are running way to rich actually. You are losing power running that way. I dont know how many times you are allowed to fail your test, but i would turn the screw a little at a time until she goes through

[my1st911]

Your basic problem you have with the CO and HC is that you are running rich. Way to rich. All the airpumps in the world, or brand new cats wont solve your problem at all. The air pump is to add air to an engine that was just started and cold, to help it burn cleaner. When the car is all warmed up, air pump doesnt do much of anything. A cat helps convert the burnt fuel into different less toxic compounds. The problem is that if you run to rich, a new cat wont be able to work correctly. Adjust your CO adjustment on your fuel distributor. Trust me

[boyt911sc]

Ryan,

There are two (2) important components of the SC smog pump unit not shown in the picture. The pump belt and the rubber hose (90° elbow) that connects the two small gizmos in the center of the pic. I'll re-assemble the parts together and post the picture to guide you during installation.

Or find someone local who has a car with smog pump. I quess if you post and ask, guys around your area will be giving you plenty of help. Let's get this car ready for spring!!!!

Tony

[HarryD]

Ryan,

This chart shows you how your mixture affect CO, HC and NOx. Richer is lower Lamdbdas.



As you may note if your CO as you lean you car out to get a better HC, Your CO may actually go up.