This is topic Didn't pass smog in forum Tech Talk at Northern California Ford Owners  .


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Posted by Mrk50LX (Member # 5147) on :
 
Just took the car to get smoged and it didn't pass the NOx is to high anyone have any ideas on how or what to fix [Confused]
 
Posted by NO MANRZ (Member # 566) on :
 
how did your HC numbers look? Clean your EGR valve and make sure you don't get any EGR error codes from the computer. advancing your timing will also reduce nox, but will increase HC as well.
 
Posted by ported8650 (Member # 6602) on :
 
did you remember to put 87 in the tank?
 
Posted by losbadgts (Member # 4394) on :
 
that sucks, i just took mine and everything pass except my check engine light doesnt work now i got to get that fixed [Mad]
 
Posted by 5.0#4 87 T-Top GT (Member # 1534) on :
 
quote:
Originally posted by NO MANRZ:
how did your HC numbers look? Clean your EGR valve and make sure you don't get any EGR error codes from the computer. advancing your timing will also reduce nox, but will increase HC as well.
Advancing the timing will defenatly make the car fail, combustion temp rises with more timing causing nox. put the timing at 8* and it will still pass when they check it. Apply vacuum to the egr valve and make sure the engine dies, if it doesn't then the egr valve is broken or the passage is plugged.
 
Posted by Mrk50LX (Member # 5147) on :
 
Everything else was pass but the NOx The smog place said it might be the cats. I'm going with the EGR route first Thanks for the help
 
Posted by 5OHS5OH (Member # 4665) on :
 
Go to Kragen, Pep Boys whatever and buy a bottle of "Guaranteed to Pass" It's like 10 bucks. Run it through one tank of gas, then put in premium fuel with a bottle of octane booster. It made my commuter car pass with 240k on the ticker. It lowered the NOx just enough to give me two more years.
 
Posted by BCINGUU (Member # 2397) on :
 
Do what 5.0#4 said, and make sure you back your timing way down.
 
Posted by Cobra5.0Jeep (Member # 1482) on :
 
quote:
Originally posted by ported8650:
did you remember to put 87 in the tank?
You mean 91...
 
Posted by 89saleen (Member # 3083) on :
 
quote:
Originally posted by Mrk50LX:
anyone have any ideas on how or what to fix [Confused]
Try a different smog shop.. mine didnt pass and then I went down the street and it passed.
 
Posted by Mrk50LX (Member # 5147) on :
 
Found the EGR isn't working. Going to get it fix Friday.THanks for all the info
 




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