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Author
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Topic: 91 5.0 failed smog
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stoauto
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Member # 2803
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posted
 
 
what is "NO2" or something like that, it failed that part of the test at 15 mph. just need a quick answer. thanks.
Posts: 1054 | Registered: May 2003
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nitrous_bob
CAFords OG
Member # 77
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posted
co is carbon monoxide....
nox is (i think) noxious fumes
if the numbers were close .... you can get it to pass w/ lots of octane and a really hot car.
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5.0 OG since 1990
Posts: 1402 | From: st clair shores MI | Registered: Nov 2000
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Mario@Strictly-Motorsports
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Member # 381
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posted
NOX means that your cats are basically toast.
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Mario
Posts: 221 | From: San Jose, CA, USA | Registered: Aug 2001
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stoauto
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Member # 2803
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posted
thanks alot guys, really appreciate it! ![[Smile]](smile.gif)
Posts: 1054 | Registered: May 2003
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jaybquick
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Member # 4286
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posted
Nox is Oxides of Nitrogen also referred to as photochemical smog. It is caused by high combustion chamber temps common to todays fuel injected cars. They invented EGR valves and Catalytic converters to fight it. Post all your readings even O2 and I will tell you your problem. Good Luck
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91 Mustang GT ET: 11.92@115
66 Mustang ET: 11.43@119
01 Audi S4 ET: 10.8@131
05 Audi S4 ET: 11.9@116
08 Audi S5 ET: 11.9@118
Posts: 416 | From: Lathrop | Registered: Mar 2004
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Hungry Hippo
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Member # 537
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posted
nox is mostlikely a faulty egr
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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AcesWild85
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Member # 2616
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posted
Won't a bottle of isopropyl alchohol in the tank help solve this?
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College student and U.S. Marine; The possibilities are endless...
Mustangs aren't built; they're born!
Posts: 844 | From: San Jose, CA | Registered: Mar 2003
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90FoX
FoX
Member # 1974
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posted
When I had to smog my 1990 5.0 lx I was running a Bassani high flow (only 2 high flow cats)x pipe.
What exhaust are you running?
I passed everything except NOX.I ran the codes from the computer and found out that my egr sensor was reading higher volts than it should be. So I used a voltmeter tested it out and it was higher than specs, I used the directions from a Chilton to test it. I replaced it and ran it through the smog again....didn't pass, still high on NOX levels. Then I just said fuck it put on my stock h-pipe and passed fine. What I'm trying to say is if your running an aftermarket exhaust system, maybe you just need to put on your stock h-pipe, because your cats on the aftermarket exhaust aren't doing their job well enough.
Good Luck ![[patriot]](graemlins/patriot.gif)
Posts: 5364 | From: Shooting Skeet | Registered: Oct 2002
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stoauto
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Member # 2803
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posted
thanks for all the replies. the car has almost completely stock exhaust except for some perf. mufflers.
Posts: 1054 | Registered: May 2003
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jaybquick
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Member # 4286
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posted
my 347 passes no problem with a basani x and high flow cats. If all your systems are working right and the cats are good you will pass right no problem. Post all your readings.
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91 Mustang GT ET: 11.92@115
66 Mustang ET: 11.43@119
01 Audi S4 ET: 10.8@131
05 Audi S4 ET: 11.9@116
08 Audi S5 ET: 11.9@118
Posts: 416 | From: Lathrop | Registered: Mar 2004
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migs66/92
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Member # 4811
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posted
hey guys im having the same problem with my 92
i have i replaced the cats, put new egr,exhaust system is pretty much stock with flowmaster mufflers ived taken it to the smog shop 3 times and its now considered a groos poluter does anyone know of a good shop in stockton that can find the problem and fix it right i have until 12-12-04 to do this
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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Fostang
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Member # 3752
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posted
quote:
Originally posted by migs66/92:
hey guys im having the same problem with my 92
i have i replaced the cats, put new egr,exhaust system is pretty much stock with flowmaster mufflers ived taken it to the smog shop 3 times and its now considered a groos poluter does anyone know of a good shop in stockton that can find the problem and fix it right i have until 12-12-04 to do this
Do you know where the mercedes dealership is in stockton off of west lane.
Angkor body and paint?
Anyways there is a place called valley Differentials right there.
I'll be there today if you wish I can take a look at it and see whats the deal.....Can even smog it next door if you wish but it must pass the sniffer though no hook ups. My name is Sal btw.
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3013 | From: Stockton/Danville | Registered: Nov 2003
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migs66/92
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Member # 4811
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posted
hey thanks fostang yeah i can make it what time?? pm me please and ill give you my cell # so we can talk thanks again
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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Jdub07
( O Y O )
Member # 2728
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posted
I thought your o2 senssors had somehting to do with that. I could be wrong.
Posts: 7282 | Registered: Apr 2003
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migs66/92
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Member # 4811
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posted
i put new ones also and it went from bad to worse
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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CDT
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Member # 5004
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posted
EGR
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Custom Dyno Tuning
510.331.0608
Home of Flat Fee Tuning For All Cars, Trucks and SUV's, EFI & Carb, SCT, AFR, Dynatech, STS Turbos, N2O Refills
Posts: 1053 | From: Hayward | Registered: Nov 2004
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