inspection time

[jetjock]

A large enough induction leak would drive the mixture lean and increase NOx but you claim to have a rich mixture. However since CO suppresses NOx a rich mixture is unlikely. See the problem? As I've said many times before anyone seeking emissions help needs to post their test results.

 

[Kckazdude]

A large enough induction leak would drive the mixture lean and increase NOx but you claim to have a rich mixture. However since CO suppresses NOx a rich mixture is unlikely. See the problem? As I've said many times before anyone seeking emissions help needs to post their test results.

Very true! Using only a quarter of the information gives even less of the picture. Post up the miles, NA or turbo, and full test results for us.

 

[taka21]

Very true! Using only a quarter of the information gives even less of the picture. Post up the miles, NA or turbo, and full test results for us.

87 N/A 197000 miles
first time i took it through
co 10.1985 gpm needs to be under 30.0000 pass
hc 1.0167 gpm needs to be under 2.0000 pass
nox 4.6270 gpm needs to be under 3.0000 fail

the second time i took it through ( with a bottle of everclear in the tank)
co 8.2180 gpm needs to be under 30.0000 pass
hc 0.9239 gpm needs to be under 2.0000 pass
nox 3.7753 gpm needs to be under 3.0000 fail

 

[Kckazdude]

You arent running as rich as I suspected you were. WTH is everclear anyway? Hopefully not what I am thinking. (If it is what else do you pour into small dark holes?!?)

Test all possible leaks into your air intake from the AFM to the intake plenum. Your accordian hoses, TB gaskets and IAC hoses as well. Replace as needed. Also check your timing.

 

[jetjock]

Kck: You don't know what everclear is? Were you never young?

http://tinyurl.com/ktsf3

Taka: You aren't rich. As Kck said you're either lean or have an inop EGR. Check that stuff. Also measure the O2 sensor to see if fuel control is centered.

 

[taka21]

checked the egr and its good
going through and replacing all vac lines
those are the only leaks i can find

 

[taka21]

ok so im almost out of ideas
how can you bring down exhaust temps

i fixed all the vac leaks
im at my wits end

this is what i have so far
apparently im running lean my cat is good and i have replaced 15 feet of vac line under the hood

what else can i do to bring down the nox reading
the vac lines helped but nowhere near enough

if i change out the o2 sensor will that do it ?

 

[taka21]

ok so im almost out of ideas
how can you bring down exhaust temps

i fixed all the vac leaks
im at my wits end

this is what i have so far
apparently im running lean my cat is good and i have replaced 15 feet of vac line under the hood

what else can i do to bring down the nox reading
the vac lines helped but nowhere near enough

if i change out the o2 sensor will that do it ?

brand new o2 sensor olny knocked it down .6 (without the everclear)
what else could i replace