Did this K20 come factory with catalytic converter?

[Grit dog]

He said the under hood sticker was missing. I was asking about the Service Parts Identification sticker/label that should be on the inside of the glovebox door. I will list the engine code (LT9,LS9,LE8 etc).

And I quoted @AuroraGirl, responding to her post.

 

[Keith Seymore]

He said the under hood sticker was missing. I was asking about the Service Parts Identification sticker/label that should be on the inside of the glovebox door. I will list the engine code (LT9,LS9,LE8 etc).

SPID is shown in post #7.

K

 

[ButchM]

SPID is shown in post #7.

K

Post #7 is from Juke22, who I sent the parts manual pics for his 86.
Post #23 from Paul @84GMCSierra is asking for charts for his 84. That's who my SPID question was directed to, just trying to help out fellow ol truck lovers. Doesn't seem right to be calling the 86 crew cab an ol truck. I bought it in 88 with 29k on it.

K, BTW, that link you sent for the 1986 Truck information was excellent. I have the factory service manual for my 86 and I'm not sure it has all the info in the manual you linked, Thanks!
B

 

[ButchM]

And I quoted @AuroraGirl, responding to her post.

Todd
Apologies, I had not expanded the post you replied to. Thanks
B

 

[84GMCSierra]

Here's the tags, and SPID on my truck, as well as a pic of the QJet, that was on it when I bought it, and the Edelbrock that's on it now.

 

[ButchM]

Here's the tags, and SPID on my truck, as well as a pic of the QJet, that was on it when I bought it, and the Edelbrock that's on it now.

Paul
I'll dig up all the info I can and get it over to you later today or this evening.
Butch

 

[84GMCSierra]

Paul
I'll dig up all the info I can and get it over to you later today or this evening.
Butch

Thank you so much. I appreciate it!

 

[Catbox]

Note: The above applies only to U.S. vehicles. Canadian Chevy/ GMC trucks followed a much simpler story, I think. From what I have seen, no Canadian carbureted Chevy/ GMC C/K/R/V used cats, while all '87 and later fuel injected models did.

Just for the FYI of it....
My Canadian born and raised truck had a cat under it.
So I have to keep them under it to pass the test.
Lame.
However, it has passed the sniffer test with empty cats the last couple of times through...


And yes, the speedo measures units of maple syrup still.

 

[Ricko1966]

He said the under hood sticker was missing. I was asking about the Service Parts Identification sticker/label that should be on the inside of the glovebox door. I will list the engine code (LT9,LS9,LE8 etc).

Heavy duty emissions the engine is certified not the body, that's why I warned O.P. don't bring too much attention to his engine swap,he has to have an air cleaner with emissions sticker to pass inspection.

 

[Ricko1966]

Fortunately cash for clunkers hasn’t been an issue since 2009.
Year over year, state emissions testing has been reduced or stayed the same. Not certain any state has made tougher emissions testing requirements in a long time.
EV sales and EV initiatives and production are leveling off, EV incentives are getting lower or more restrictive.
My post and this discussion have little to no bearing over “classic” vehicle policy. My point was simply to identify the Facebook-esque responses.

I'm just afraid they'll bring back cash for clunkers again to promote EV sales and try to get more ICE off the roads. I don't Facebook so not sure what facebook-esque is. Only social media I do is this forumn. I read off of some others sometimes but this one is the only one I participate in. A pretty good bunch if people here,everyone pat yourselves on the back.

 

[AuroraGirl]

My no cat 86 C6P has like 3 different factory heat shields underneath.
And the OP doesn’t have the sticker. He qualified that in the first post. And they all have evap.

oops good call, i didnt see the sticker thing. And darn, well hopefully hes got his canister and line intact to the tanks

Your 86 has the cat heat shields or just exhaust heat shields?
I was referring to the big one that would be where the wide/flat cat props up

 

[ButchM]

Paul
This is the body type chart for 84, yours is an 03.

You must be registered for see images attach

This is the exhaust parts illustration for the LT9 engine.

You must be registered for see images attach

These are the emissions control parts.

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

B

 

[Juke22]

All, thank you for the info. In regard to the original post, not the hijack, I found a shop that did the “2 speed test”, they asked what engine I had and I said a 350.

I failed carbon monoxide CO by a few percent (result below). I’m reading now about tuning or rebuilding the carb, any suggestions to get it to pass so I can get plates before my temporary tag expires? Considering HC was low, maybe I can retard the timing?

Should I just rebuild carb, replace spark plugs, and air cleaner? Could that get me under the CO limit?

Thank you.

You must be registered for see images attach

 

[Juke22]

Duplicate post

 

[ButchM]

All, thank you for the info. In regard to the original post, not the hijack, I found a shop that did the “2 speed test”, they asked what engine I had and I said a 350.

I failed carbon monoxide CO by a few percent (result below). I’m reading now about tuning or rebuilding the carb, any suggestions to get it to pass so I can get plates before my temporary tag expires? Considering HC was low, maybe I can retard the timing?

Should I just rebuild carb, replace spark plugs, and air cleaner? Could that get me under the CO limit?

Thank you.

You must be registered for see images attach

Jake
As I recall advancing timing lowers CO, CO2 and HC. It also raises NOX but it doesn't look like they are measuring that for you. It used to be a balancing act between the four.
If you are not limited by number of failures I would recommend:
- New air filter, spark plugs
- You can test measure resistance of plug wires, but a new good quality set may be a good idea. Same for distributor cap and rotor.
- I've always ran a low resistance distributor "Button" such as this- MSD Ignition 8412 HEI Distributor Bushing. It made a noticeable improvement in throttle response by seat of the pants feel. Been quite awhile but seems to me it increased fuel economy by almost 1 mpg.

You must be registered for see images attach

- Clean or replace PCV valve
- Advance timing a couple of degrees
- Set idle speed to correct setting.
- Make sure choke is fully open when engine warm.
- Check all vacuum lines/hoses for leaks
- Most important -> make sure you engine is completely warmed up, as close to 200 degrees as you can get it. Cold/cool engines don't burn fuel as efficiently and have much unburned fuel that drives up emissions.
If it generally drives and idles good/smooth
G'Luck
Butch