CA Smog Fail help

[S14Magician]

Heres the deal i have a 95 240sx its been parked a while and when i had the smog test done when we moved to CA it failed, running rich, any ideas?

[compactfean]

What were the numbers

[S14Magician]

%CO2 %O2 HC (PPM) CO (%) NO (PPM)
TEST RPM MEAS MEAS MAX AVE MEAS MAX AVE MEAS MAX AVE MEAS
15 MPH 1791 14.7 0.1 88 39 73 0.36 0.03 0.22 493 155 720
25 MPH 1775 14.7 0.1 53 23 61 0.35 0.04 0.24 516 148 573

This is what the paper the guy gave me looks like idk if it helps but anything you can do to help is greatly appreciated.

[compactfean]

On the paper is it sectioned off so I can see each individual gas numbers? I can't tell which is which.

[corn322]

Reformating magic = filling with underscores 'cause whitespace gets deleted.

________________%CO2_%O2_____HC (PPM)__________CO (%)__________NO (PPM)
TEST........RPM | MEAS MEAS | MAX AVE MEAS_ | MAX AVE MEAS | MAX AVE MEAS
15 MPH.....1791 | 14.7 _ 0.1 _ |_ 88 _ 39 _ 73 _ | 0.36 _ 0.03 _ 0.22 | 493 155 720
25 MPH......1775 | 14.7 _ 0.1 _ |_ 53 _ 23 _ 61 _ | 0.35 _ 0.04 _ 0.24 | 516 148 573

CO2 is good, so you're combusting efficiently. HC just barely went over, and the NOx is over.

I say check for vacuum leaks.

[S14Magician]

Any pointers on where to start? Big help thank you

[S14Magician]

Or are there any tricks to checking for leaks

[S14Magician]

?

[compactfean]

Use some Carb clean and spray around injector o-rings, intake Mani gasket, throttle body etc. If idle fluctuates than you got a leak there. Check for leaks /tears in vacuum lines and couplers. Check intake tubing for cracks. If all is good. Than check the egr system because its primary job is to reduce nox. Your hc is due to incomplete combustion aka timing, bad plugs wires, misfire (lean or rich). That hella sucks they test for nox in Cali, here in NV they don't.

[iggyspeed]

the easy way to pass this smog is just to call me. lol

[S14Magician]

where you at iggy? im in Sac. pm me a number i can text you at

[S14Magician]

or text me 520-243-9370

[S14Magician]

okay round, fixed the alternator and checked for vac leaks and i cant find any leaks, took it in and ran another smog test on it here are the new numbers, again any help is greatly appreciated.
-----------------------------CO2----O2----------------HC--------------------CO---------------------NO
TEST------RPM------MEAS------MEAS----MAX---AVE---MEAS----MAX---AVE---MEAS----MAX---AVE---MEAS
15MPH---1736------14.8--------0.1-------88-------39-----74--------0.36----.03----0.31-----439----155----830
25MPH---1774------14.9--------0.1-------53-------23-----62--------0.35----.04----0.27-----516----148----710

[zer0c123]

Check the egr system to ensure it's working properly. Search the forums for procedures on this.

[iggyspeed]

or call me back. LOL

[corn322]

Still running rich. Do you have a volt meter? Check the water temp sensor and the oxygen sensor.

[S14Magician]

I've got it at a shop right now they were going to clean all the egr system and couldn't get the ports open so their replacing the top half of the intake manifold and cleaning everything up so hopefully that fixes it ill let you know tomorrow

[GymkhanaS13]

Did you get your car back? I am trying to get through Cali smog too!

[S14Magician]

Negative. Hopefully today ill let you know

[BigDAT]

iggy arent you in santa rosa? sneaky sombitch

[S14Magician]

Got her back today. $650 and a new upper intake manifold later. She passed smog at 1/2 the allotted NoX amount along with everything else way below. The egr ports were clogged beyond help so you all were right to an extent the egr system was working just mad gummed up. If you're in the Sac. Area and need help let me know the guys at the shop I took it to were beyond helpful. Thanks again everyone.

[iggyspeed]

ouch

[iggyspeed]

iggy arent you in santa rosa? sneaky sombitch

nope. =)