[david7212]

1984 380sl...with a never ending 02 light on, my HC count was 121, with a mas allowed being 122, CO was .20 with a max of .77 being allowed, NO was 807 with a max of 1081 allowed, so my hydrocarbon count was at the top, while NO was also high, CO was well within the limits....what should i make of all this? what needs to be checked and replaced? thanks.

 

[ScottinSoCal]

1984 380sl...with a never ending 02 light on, my HC count was 121, with a mas allowed being 122, CO was .20 with a max of .77 being allowed, NO was 807 with a max of 1081 allowed, so my hydrocarbon count was at the top, while NO was also high, CO was well within the limits....what should i make of all this? what needs to be checked and replaced? thanks.

High HC means you're running rich, high NOx means you're running hot.

 

[david7212]

the tech said i wasnt running rich because my CO levels were acceptable, i said if i have unburned fuel...isnt that to rich..he said not..u have a decent fuel mixutre, its just that your car isnt burning it the way it should....1/2 full or 1/2 empty?

 

[ScottinSoCal]

the tech said i wasnt running rich because my CO levels were acceptable, i said if i have unburned fuel...isnt that to rich..he said not..u have a decent fuel mixutre, its just that your car isnt burning it the way it should....1/2 full or 1/2 empty?

Unless he was able to produce unburned O2 readings, I'd say you're running rich. Too much fuel with not enough oxygen to burn it means you're running rich.

 

[david7212]

i agree...time for a decent tune up....

 

[daryn]

maybe your burning oil, but who cares you passed. Did the state offer you 500bucks to send you car to the threader like they did me, they wanted to turn it into german beer drinking mugs.

 

[nobby]

maybe your burning oil, but who cares you passed. Did the state offer you 500bucks to send you car to the threader like they did me, they wanted to turn it into german beer drinking mugs.

Maybe they just thought your car should be in the "threader".

 

[isthisdave]

Maybe they just thought your car should be in the "threader".

Or maybe the 'thrusher'?

 

[Georgeous]

maybe your burning oil, but who cares you passed. Did the state offer you 500bucks to send you car to the threader like they did me, they wanted to turn it into german beer drinking mugs.

I'd drink from such a beer mug...

-George

 

[daryn]

I guess my spelling/typing got away from me "shredder" is what I should have written.

 

[david7212]

i just pulled the plugs...the factory ga p is .32...the old plugs were probably at about 45....im sure that didnt help properly ingnite...

 

[mslchief]

I guess my spelling/typing got away from me "shredder" is what I should have written.

Shredder is the name of the dog in the newest Odor Eater commerical. Why would he get your car?

But seriously when I get the reading as too rich I change out the air filter (or just remove it for the test). As another said, you're not getting enough air.