This is topic smog check questions in forum Tech Talk at Northern California Ford Owners .
To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=026850
Posted by boss306 (Member # 10509) on
:
can anybody help explain what the numbers mean c02 11.2 & 11.0 %02 5.1 & 5.2 HC 15 & 9 C0 BOTH 0 NO PPM 2.96 & 310 the car has 17000mi on it.
Posted by LXjames (Member # 10791) on
:
Co2 is combustion efficiency
02 is oxygen
Hc is hydrocarbons aka raw unburnt fuel
Co is carbon monoxide aka nox
You want high co2 and low very thing else. If I knew the standards fr your car I could help you out furthe. Also did you pass or fail? Need all the info you got. Car, mods, pass or fail...
If you have high hc then you got a lot of raw gas in your exhaust if you have high o2 you got a lot of oxygen in your exhaust which means either a lean afr or exhaust leak pulling in outside air
You want low nox can't remember about it right now tho
Posted by LXjames (Member # 10791) on
:
Check this out. Should be a sticky for smog questions
http://www.autoshop101.com/forms/h56.pdf
Posted by boss306 (Member # 10509) on
:
the car passed the mods are stock explore heads 180 tstat aem cool air intake flowmaster muffs msd iginiton coil msd dizzy for the test i put the timming back to 10dg stock cats.
Posted by LXjames (Member # 10791) on
:
Doesnt the smog slip give you the standard too and also what car is is you only said it passed and it's stock sorry
Posted by boss306 (Member # 10509) on
:
sorry its a 1992 mustang gt 5spd 17k miles the slip give max allowed reading at 15&25 mph max HC IS 80&62 I GOT 15&9 MAX CO .052&.042 I got 0&0 max NO PPM 565&615 I GOT 296&310 the mods are explorer non p heads aem cool air intake 180 tstat msd dizzy msd ignition coil flowmaster muffs upgraded cooling system the rest is stock hope this helps.
Posted by boss306 (Member # 10509) on
:
dont know if this help but it uses no oil at all and leaks no cooliant
Posted by boss306 (Member # 10509) on
:
and it 170k on the engine not 17k sorry my heads must be in the clouds or it could be my 3 year old taking most of my attention.
Posted by LXjames (Member # 10791) on
:
Well it looks like your car is doing great. Almost an antique/classic and it's posting some really good smog numbers. Like I said if you have high co2 everything else is pretty much taken care of. Keep up the maintenance and it should be good
Posted by boss306 (Member # 10509) on
:
yea when i got the car about 5yrs ago it was getting at best 200 miles a tank now after all of the work i put it i get 300 with mixed city freeway and i got 377 out of a tank when i drove to redding all freeway i just didnt know what the numbers on the smog sheet meant thanks for the help.
Posted by LXjames (Member # 10791) on
:
Man it's no problem and good job
Posted by Stang66 (Member # 10504) on
:
besides i read explore heads burn more efficiently then stock e7s ![[patriot]](graemlins/patriot.gif)
Posted by SacStangDriver (Member # 8304) on
:
co is not aka nox
co is a rich indicator and
nox is when the combustion chamber is over 2500 degrees and nox is formed from heat
nitrogen with oxygen and x for unknown value because we dont know how many oxygen molecules formed into the nitrogen. nox is a man made gas.
I have my smog license. I have to know about all 5 gases like the back of my hand.
[ May 24, 2012, 11:12 PM: Message edited by: SacStangDriver ]
Posted by boss306 (Member # 10509) on
:
so what should co be at.
Posted by SacStangDriver (Member # 8304) on
:
every car is different for the acceptable #'s. most cars should be under .5 co.
HC = unburnt fuel
CO = rich indicator
NOX = to much heat (egr takes car of this, or vvt)
O2 = lean indicator or misfire
co2 = combustion efficiency
Fueled by Ford Mustang Owners
on CaliforniaFords.com