failed smog check with stock ka - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

eerrrrr · 05-31-2007, 04:00 PM

so umm im trying to sell my car, but it failed on the idle part got 533 which is twice the gp. here are the numbers:

the guy who did it said that it might be running too rich. or a missfire. im guessing its running rich cuz it smells funky and if there is a misfire, i will be able to tell cuz it will be riding hella rough, but it doesnt. drives perfect no problems at all. so how would i fix this richness problem? stock ka with e-fan and bigger radiator, battery relocated to trunk as only mod to engine cuz i put back my stock intake stuff.

does anyone know the size of the o2 bolt thing to get it off? also where do i go now to smog since i failed? if i need to go to a ref anyone know where i can go in CHICO, CA 95926 or anywhere near. thanks.

tknbkthrsdy4anfg · 05-31-2007, 04:05 PM

get a new o2 sensor, any maybe a cat.
if that doesn't work its time for a tune-up.

eerrrrr · 05-31-2007, 04:06 PM

also i seafoamed my car like 2 hr before the smog check. would that matter?

tknbkthrsdy4anfg · 05-31-2007, 04:07 PM

I have no idea, but if your o2 sensor is bad it usually runs rich to keep the motor from grenading.

eerrrrr · 05-31-2007, 04:11 PM

i guess first thing to do is 02 cuz that hasnt been changed ever since i got my car. cats been changed last year. ummmmmmmmmmm shit fuck. spending too much money to sell it.

Mathetai · 05-31-2007, 04:17 PM

Quote:

Originally Posted by tknbkthrsdy4anfg

get a new o2 sensor, any maybe a cat.
if that doesn't work its time for a tune-up.

Bingo. +1. GL.

Anto · 05-31-2007, 04:19 PM

If the cat was changed out recently then check your o2.

o2's aren't expensive compared to cats

Irukandji · 05-31-2007, 04:21 PM

Did you change your sparkplugs after seafoaming?

jdmspooge · 05-31-2007, 04:28 PM

What year is your car/KA? IMO could be your knock sensor, primary and secondary o2 sensor, and/or cat. But if it was your cat wouldn't you notice a dramatic loss in power? hmm... Tune up wouldn't hurt too. Any pending codes; sensor malfunction. Seafoam works wonders.

GL with it. Sorry can't really help much, but to ask questions/possibilities.

eerrrrr · 05-31-2007, 05:25 PM

Quote:

Originally Posted by n1sm0r

Did you change your sparkplugs after seafoaming?

nope. should i?

Quote:

Originally Posted by jdmspooge

What year is your car/KA? IMO could be your knock sensor, primary and secondary o2 sensor, and/or cat. But if it was your cat wouldn't you notice a dramatic loss in power? hmm... Tune up wouldn't hurt too. Any pending codes; sensor malfunction. Seafoam works wonders.

GL with it. Sorry can't really help much, but to ask questions/possibilities.

1993 240sx ka24de with 192xxx miles. no loss of power, actually more power after seafoaming it.

**Phlip** · 05-31-2007, 05:35 PM

Yes, change your spark plugs after seafoaming.
Hell, change them anyway

***S14DB*** · 05-31-2007, 05:51 PM

Seafoam can seriously foul your plugs and O2.

You really shouldn't have tested with additives in the fuel system. Screwed your results. You need to burn this tank off. Then fill the tank up. Burn that one down. Then on the 3rd tank of gas, replace the Fuel Filter, Plugs and O2 sensor. Then go back.

eerrrrr · 05-31-2007, 06:37 PM

i only seafoamed the vac lines prior to the smog check. also seafoamed it yesterday when oil change. didnt seafoam the gas. but i will replace the o2 and the spark plugs soon

DOES ANYONE KNOW WHERE I GO NOW TO SMOG THE CAR SINCE IT FAILED?

eerrrrr · 05-31-2007, 10:26 PM

does anyone know the size of the o2 bolt thing to get it off? also where do i go now to smog since i failed? if i need to go to a ref anyone know where i can go in CHICO, CA 95926 or anywhere near. thanks.

xblack240x · 05-31-2007, 11:30 PM

Uhmm, pretty much a close to guarantee to pass smog is to do what I did... Seafoam, do as S14DB said and burn off that gas and another gas tank... Then a tune-up... Mine only ran me about $100, but my auto teacher got a discount on some parts for me... Change everything, fuel filter, air filter, spark plugs, wires, distributor cap and rotor, and oil and oil filter... That should be good, or you could flush your radiator as well, iirc that helps too...

05-31-2007, 04:00 PM	#1
eerrrrr Zilvia Junkie Join Date: Dec 2005 Location: FRESNO, CA Posts: 533 Trader Rating: (1) Feedback Score: 1 reviews	failed smog check with stock ka so umm im trying to sell my car, but it failed on the idle part got 533 which is twice the gp. here are the numbers: the guy who did it said that it might be running too rich. or a missfire. im guessing its running rich cuz it smells funky and if there is a misfire, i will be able to tell cuz it will be riding hella rough, but it doesnt. drives perfect no problems at all. so how would i fix this richness problem? stock ka with e-fan and bigger radiator, battery relocated to trunk as only mod to engine cuz i put back my stock intake stuff. does anyone know the size of the o2 bolt thing to get it off? also where do i go now to smog since i failed? if i need to go to a ref anyone know where i can go in CHICO, CA 95926 or anywhere near. thanks. Last edited by eerrrrr; 06-01-2007 at 12:35 AM..

05-31-2007, 05:35 PM	#11
Phlip Yes, I look like that Join Date: Mar 2002 Location: In my supervillain's lair Posts: 27,980 Trader Rating: (19) Rides Gallery: Phlip Feedback Score: 19 reviews	Yes, change your spark plugs after seafoaming. Hell, change them anyway __________________ Weirdo And I write too!

05-31-2007, 05:51 PM	#12
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Seafoam can seriously foul your plugs and O2. You really shouldn't have tested with additives in the fuel system. Screwed your results. You need to burn this tank off. Then fill the tank up. Burn that one down. Then on the 3rd tank of gas, replace the Fuel Filter, Plugs and O2 sensor. Then go back. __________________ Comments should be taken as Opinions not as Statements of Fact

05-31-2007, 06:37 PM	#13
eerrrrr Zilvia Junkie Join Date: Dec 2005 Location: FRESNO, CA Posts: 533 Trader Rating: (1) Feedback Score: 1 reviews	i only seafoamed the vac lines prior to the smog check. also seafoamed it yesterday when oil change. didnt seafoam the gas. but i will replace the o2 and the spark plugs soon DOES ANYONE KNOW WHERE I GO NOW TO SMOG THE CAR SINCE IT FAILED? Last edited by eerrrrr; 05-31-2007 at 07:09 PM..

05-31-2007, 04:06 PM	#3
eerrrrr Zilvia Junkie Join Date: Dec 2005 Location: FRESNO, CA Posts: 533 Trader Rating: (1) Feedback Score: 1 reviews	also i seafoamed my car like 2 hr before the smog check. would that matter?

05-31-2007, 04:11 PM	#5
eerrrrr Zilvia Junkie Join Date: Dec 2005 Location: FRESNO, CA Posts: 533 Trader Rating: (1) Feedback Score: 1 reviews	i guess first thing to do is 02 cuz that hasnt been changed ever since i got my car. cats been changed last year. ummmmmmmmmmm shit fuck. spending too much money to sell it.

05-31-2007, 04:19 PM	#7
Anto Zilvia Addict Join Date: Jan 2006 Location: California Posts: 862 Trader Rating: (2) Feedback Score: 2 reviews	If the cat was changed out recently then check your o2. o2's aren't expensive compared to cats

05-31-2007, 04:21 PM	#8
Irukandji Post Whore! Join Date: Jul 2004 Location: Compton Posts: 4,268 Trader Rating: (0) Feedback Score: 0 reviews	Did you change your sparkplugs after seafoaming?

05-31-2007, 04:28 PM	#9
jdmspooge Post Whore! Join Date: Jan 2006 Location: San Diego Posts: 2,609 Trader Rating: (39) Feedback Score: 39 reviews	What year is your car/KA? IMO could be your knock sensor, primary and secondary o2 sensor, and/or cat. But if it was your cat wouldn't you notice a dramatic loss in power? hmm... Tune up wouldn't hurt too. Any pending codes; sensor malfunction. Seafoam works wonders. GL with it. Sorry can't really help much, but to ask questions/possibilities.

05-31-2007, 10:26 PM	#14
eerrrrr Zilvia Junkie Join Date: Dec 2005 Location: FRESNO, CA Posts: 533 Trader Rating: (1) Feedback Score: 1 reviews	does anyone know the size of the o2 bolt thing to get it off? also where do i go now to smog since i failed? if i need to go to a ref anyone know where i can go in CHICO, CA 95926 or anywhere near. thanks.

05-31-2007, 11:30 PM	#15
xblack240x Zilvia Junkie Join Date: Mar 2007 Location: Bay Area Posts: 555 Trader Rating: (2) Feedback Score: 2 reviews	Uhmm, pretty much a close to guarantee to pass smog is to do what I did... Seafoam, do as S14DB said and burn off that gas and another gas tank... Then a tune-up... Mine only ran me about $100, but my auto teacher got a discount on some parts for me... Change everything, fuel filter, air filter, spark plugs, wires, distributor cap and rotor, and oil and oil filter... That should be good, or you could flush your radiator as well, iirc that helps too...