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#1 |
Registered User
Join Date: May 2011
Location: Raleigh, NC
Posts: 240
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My 1984 Silverado failed NC inspection today for missing an O2 sensor.
I am trying to get my Silverado back on the road. Before purchasing it last month, it had been not been inspected in NC for the previous 5 years (sitting unregistered).
Today it failed inspection for a few minor things (missing gas cap, exhaust leak, etc). One of the items that was on the list was that it was missing the oxygen sensor. My truck is carbureted now just as it was when it was new. The only difference from stock is that it has a goodwrench 5.7L instead of the factory 5.0L. It has a catalytic converter and all smog equipment. Should I just tell the inspection place that my truck never had an oxygen sensor? Maybe it did? I thought O2 sensors were only for fuel injected cars (therefore starting in 1987 for Chevy trucks). Please correct me if I am wrong. Thanks, James |
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#2 |
Registered User
Join Date: Feb 2012
Location: Lynd, Minnesota
Posts: 201
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
It shouldn't have had O2 sensors since it's carburetor
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Semi professional heavy equipment operator Amateur mechanic |
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#3 |
Registered User
Join Date: Apr 2011
Location: Kansas City, MO
Posts: 39
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
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#4 |
Registered User
![]() Join Date: Oct 2011
Location: central Oregon
Posts: 1,220
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
not sure on the sensor.....but only 4% of vehicles dont pass...thats 96% that do pass, 96% is almost 100%.......our government wastes billions of our dollars on 4%....4% has no effect on any thing ! maybee buy an old exempt square and switch plates
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88 3+3 454 400 205 410 drw to srw still in pieces 90 3+3 350 400 205 410 srw 84 1/2 ton lb 6.2 4x4 parts truck |
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#5 |
Registered User
Join Date: May 2008
Location: Spokane, Washington
Posts: 596
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Trucks did not have O2 sensors until 87 when they got fuel injection. I would tell the test station it never had one. I would hope if they are passing/failing on visual inspections they would/should know what they are looking at/for.
And 1/2 ton trucks, suburban and K5 did have computer controlled carburetors from 81ish to 86. |
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#6 | |
Registered User
Join Date: Apr 2011
Location: Kansas City, MO
Posts: 39
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Quote:
Decided to look it up on Alldata, and in 84 it does show an oxygen sensor for the 350-L engine as well as the 305-H engine. Heh, learn something new I guess unless the diagrams are wrong. |
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#7 |
Registered User
Join Date: Feb 2012
Location: Austin, Arkansas
Posts: 248
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Look at the emissions sticker.If it says CCC system,it came with an 02 sensor,and it will have a knock sensor in the side of the block,and an ECS(electronic spark control)module on the firewall or engine,near the heater housing. USUALLY,if it had an A.I.R. system,and a heat-riser,it WON'T have an o2 sensor.NOTE: If there's an ALDL(Assembly Line Data Link)under the dash,it came with an o2 sensor.
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Always expect the unexpected,....but don't expect the unexpected to be the unexpected you expect ! I'm busier than a one-legged cat,in a sandbox! Veteran..and proud ! I can't fix what ain't broke....you want I should break it? |
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#8 |
Registered User
Join Date: Sep 2010
Location: Jacksonville, NC
Posts: 596
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Your truck should only need a safety inspection. Any thing older then 15 years does not need a emission inspection in the state of NC. But the truck will still have to retain all factory emission equipment that was installed. Fix the missing gas cap and exhaust leak. Then I would find another inspection station.
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"Some people spend an entire lifetime wondering if they've made a difference. The Marines don't have that problem." President Ronald Reagan,1985 "The Marines I have seen around the world have the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps!" ..............Eleanor Roosevelt, 1945 |
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#9 |
Registered User
Join Date: May 2011
Location: Raleigh, NC
Posts: 240
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Thanks for the replies everyone.
I'll check the emissions sticker when I get home this morning. My truck has the high altitude emissions package (not sure if that means anything). Not sure what A.I.R system is, but I do believe it has a heat riser. As far as the 305-H engine goes, I believe there is a 305-F too? I am not sure of the difference. Where would the O2 Sensor be mounted? It's in the exhaust pipe right below the manifold, is that correct? If there was one I should be able to find a plug or wire hanging somewhere. Again, thanks for the help. James |
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#10 |
Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
If it has one it should be in the exhaust looks like a spark plug with wires on it close to engine.A carb engine can have o2s i had a 84 f150 that was carbed that had a o2 on it as funny as it sounds it can be true tho.
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#11 |
Registered User
Join Date: Aug 2009
Location: Oregon
Posts: 611
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Sounds like you need a 73/74 cab.
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'73 K20 Cheyenne Super Camper Special 350/TH350/NP205 sittin' on 33's. You can set my truck on fire and roll it down a hill, and I still wouldn't trade it for a Coupe de Ville. |
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#12 |
Registered User
Join Date: May 2011
Location: Raleigh, NC
Posts: 240
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Here are some pictures I took today. Like everyone says, I think my truck did have an O2 sensor originally.
Does anyone know where it was originially located (drivers side or passenger side exhaust pipe) so I can find where the original wire is on the engine harness. According to a wiring diagram I have, I am looking for a purple wire. I think the ground wire is a tan color. ![]() Passenger side ![]() ![]() ![]() Driver side ![]() ![]() |
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#13 |
Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
I can't read the emissions label. You said it was a High alt. emmissions label right. What does it say beside the Ign. timing degree BTDC @rpm? 4@600? The only 5.0 or 5.7 that had an o2 sensor was California emmisions vehicles. That label would say ign. timing 8@500 btdc and you would also have a MIL light on the dash. Oh btw I am reading that straight from the NCDMV testing manual and I am a NC liscensed inspector. I think they may have misread the label. Hope this helps.
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT Last edited by silvereagle07; 03-01-2012 at 07:29 PM. |
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#14 | |
Registered User
Join Date: May 2011
Location: Raleigh, NC
Posts: 240
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Quote:
Wow, and NC inspector on the forum! Thank you very much for your response! I have uploaded another picture of the sticker so you can see. The timing degree at BTDC is 4@600. I will be putting on a new exhaust system this weekend, and I have several other parts on order. Like you said, ill just explain to them that the truck was never equipt with an O2 sensor. So the fact that the truck has a replacement engine (was 5.0, replacement is 5.7) should not matter correct? ![]() |
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#15 | |
Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
Quote:
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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#16 |
Registered User
Join Date: Feb 2012
Location: Camas WA
Posts: 175
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
You could always move to washington state where the inspection stops when your rig turns 25. IN THE CLEAR
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#17 |
Registered User
![]() Join Date: Oct 2011
Location: Wildomar, CA
Posts: 466
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
CA emission'd feedback carbs had one 02 sensor in one manifold (essentially measuring only one side of the engine). My 85 was originally a 305F (350 now) truck and has the o2 in the pass. side manifold, feedback / ecm carb (2 stage accelerator pump,TPS and Mixture control solenoid), A.I.R., E.F.E, distributor with NO vaccum advance or centrifigul (solely controlled by ecm) and NO E.S.C. module or knock sensor (which I always found strange but hey, it's CA).... So yes, Carbureted engines did exist with 02 sensors but mostly out here in the land of fruits and nuts (I can say that, I'm from Boston originally LOL). Yours most likely is not equipped with one and I agree with the others, take it to another shop....
Had a smog shop tell one of our vehicle owners (I'm a OEM field service rep) the other day that his 22,000lb GVW vehicle is supposed to have 4 o2 sensors. Sorry, wrong answer, heavy duty emissions does not require post catalyst o2's. Had to call the shop and explain as did the Bureau of Automotive Repair.... Not uncommon for a shop to make a mistake and fail a vehicle for a reason that it should not have been failed.... |
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#18 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
My factory manual has wiring for O2 sensors as far as '83. Cali models had them. Not sure about others.
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#19 |
Registered User
Join Date: Feb 2012
Location: Austin, Arkansas
Posts: 248
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
My '85 is a factory-stock 5.0,other than the carb being changed,and it didn't come with an02,or even a cat.I just got the parts to swap it to a dual exhaust,and I don't even worry about air-pumps,and egr valves.
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Always expect the unexpected,....but don't expect the unexpected to be the unexpected you expect ! I'm busier than a one-legged cat,in a sandbox! Veteran..and proud ! I can't fix what ain't broke....you want I should break it? |
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#20 |
Registered User
Join Date: Sep 2011
Location: Stockholm
Posts: 263
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Re: My 1984 Silverado failed NC inspection today for missing an O2 sensor.
My 86 has the Co2 sensor, itīs located in the driver side manifold, pointing straight towards the cab. Here is a picture of the mainfold, red arrow shows were it sits. My truck is Californis emissons equiped and all stock, except for dual exhaust pipes.
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Tom.______________________________________ The fleet: 2007 BMW 530xi M (daily driver) 1986 C-10 Stepside (project "my time") 1992 Corvette cab (summer time daily driver) 1969 Cadilac DeVille Cab ("it just need some paint") |
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