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Author
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Topic: smog check questions
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boss306
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Member # 10509
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posted
 
 
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.
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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LXjames
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Member # 10791
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posted
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
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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boss306
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Member # 10509
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posted
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.
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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LXjames
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Member # 10791
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posted
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
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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boss306
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Member # 10509
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posted
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.
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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boss306
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Member # 10509
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posted
dont know if this help but it uses no oil at all and leaks no cooliant
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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boss306
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Member # 10509
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posted
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.
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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LXjames
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Member # 10791
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posted
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
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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boss306
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Member # 10509
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posted
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.
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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LXjames
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Member # 10791
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posted
Man it's no problem and good job
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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Stang66
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Member # 10504
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besides i read explore heads burn more efficiently then stock e7s ![[patriot]](graemlins/patriot.gif)
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1966 Ford Mustang
1990 Notchback
1975 Pontiac Trans Am 400ci
Posts: 754 | From: Stockton | Registered: Dec 2010
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SacStangDriver
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Member # 8304
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posted
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 ]
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Need sidework done at great prices? I work on all makes and models from engine work to gears. Check engine light problems too. 916 912 3493
Posts: 1217 | From: sacramento | Registered: Mar 2008
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boss306
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Member # 10509
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posted
so what should co be at.
Posts: 28 | From: kingsburg ca | Registered: Dec 2010
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SacStangDriver
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Member # 8304
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posted
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
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Need sidework done at great prices? I work on all makes and models from engine work to gears. Check engine light problems too. 916 912 3493
Posts: 1217 | From: sacramento | Registered: Mar 2008
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