FAILED my CA smog test, help!
03-19-10, 05:47 PM
#1
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FAILED my CA smog test, help!
so thats what my test came out to be...
high NOX, best bet would be the cat?
awhile back my cat's heat shield tore off, i noticed between the cat and the head shield, that there's this cloth material, similar to the packing within mufflers. is that to help the cat get into proper working temperature? or is the cloth just to reduce metal rattle from the cat and the head shield?
my car's idle is also at 1k, ill probably adjust my ICV and then re time it again.
what do you guys think?
Last edited by rwdanthony; 03-19-10 at 05:58 PM.
03-21-10, 10:37 AM
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The cat is a guess at this point. Fix what you know is broken...idle too high. A lean burn will cause your failure and a vac leak will do both. Watch your idle closely and sray carb cleaner around all the hoses and mating surfaces in the intake. If the engine inhales any it will change the idle speed and you will know the location of th leak. Service the egr anyway you look at it. Verify your timing as that will thrw the reading off also.
03-21-10, 12:49 PM
#10
your other numbers are too good in some areas. you just have to get the right balance. I would think egr clogged or running too lean. maybe your timing is a little advanced? if you retard it some for the test you can lower your nox numbers a bit at the expense of some of the other areas but looks like you have room to work with. alot of smog techs/mechanics will try this on the spot when they see numbers like that.
Last edited by Ali SC3; 03-21-10 at 12:53 PM.
03-21-10, 01:15 PM
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right now i know my idle is high, ranging from 900-1200.
my car smells like gas fumes.
my cat never crackles or pops like how it used to. [before i would shut the car off right after driving and it would crackle/pop] i then figured out that im suposed to let it idle a bit so it can cool down properly. but i re-did it my old habbit of just turning it off after, and it doesnt crackle anymore.
ima check the egr valve, check my vacuum lines, replace the cat.
how would i go about adjusting the idle? ICV (idle control valve)?
i also have a bfi with a HKS filter, ill probably swap that with a stock air box as well. or would that not change anything? i recently reset my ecu but no real difference.
exhaust piping is completely stock, but i really think my secondary cat doesn't get as hot as it supposed to becuase the heatshield/packing is gone...
oh yeah, im also ranging like 200-250 miles a tank
my car smells like gas fumes.
my cat never crackles or pops like how it used to. [before i would shut the car off right after driving and it would crackle/pop] i then figured out that im suposed to let it idle a bit so it can cool down properly. but i re-did it my old habbit of just turning it off after, and it doesnt crackle anymore.
ima check the egr valve, check my vacuum lines, replace the cat.
how would i go about adjusting the idle? ICV (idle control valve)?
i also have a bfi with a HKS filter, ill probably swap that with a stock air box as well. or would that not change anything? i recently reset my ecu but no real difference.
exhaust piping is completely stock, but i really think my secondary cat doesn't get as hot as it supposed to becuase the heatshield/packing is gone...
oh yeah, im also ranging like 200-250 miles a tank
Last edited by rwdanthony; 03-21-10 at 01:18 PM.
03-21-10, 02:17 PM
#12
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check the egr valve, like above said, and then check the modulator for the EGR. make sure all the lines are good. if you have a vacuum pump you can check to make sure the EGR valve is functioning. have the car running, and pump some vacuum to it, if the engine dies, then your passages are good. then make sure you are getting vacuum to the valve, and to the modulator.
