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Author
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Topic: Didn't pass smog
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Mrk50LX
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Member # 5147
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posted
 
 
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]](confused.gif)
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92 LX conv W/M&M,and Maier Racing Suspension components. MAC Headers and 2.5in MAC exhaust.70mm MAF 65mm Throttle body
Posts: 34 | From: Fremont, CA | Registered: Dec 2004
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NO MANRZ
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Member # 566
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posted
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.
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Bring It . . .
Posts: 1938 | Registered: Nov 2001
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Le Blanc
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Member # 6602
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posted
did you remember to put 87 in the tank?
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3 valves per
Posts: 139 | From: Cam Park | Registered: Mar 2006
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losbadgts
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Member # 4394
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posted
that sucks, i just took mine and everything pass except my check engine light doesnt work now i got to get that fixed ![[Mad]](mad.gif)
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Why pretent someone u are not, everyone else could see it.
Posts: 3625 | From: redwood city | Registered: Apr 2004
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Copello
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Member # 1534
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posted
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.
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91 GT
73 RS Camaro
Posts: 1309 | From: San Mateo | Registered: Jul 2002
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Mrk50LX
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Member # 5147
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posted
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
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92 LX conv W/M&M,and Maier Racing Suspension components. MAC Headers and 2.5in MAC exhaust.70mm MAF 65mm Throttle body
Posts: 34 | From: Fremont, CA | Registered: Dec 2004
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5OHS5OH
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Member # 4665
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posted
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.
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89 Convertable GT
BBK Headers, cai
Posts: 1044 | From: San Bruno | Registered: Jul 2004
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BCINGUU
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Member # 2397
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posted
Do what 5.0#4 said, and make sure you back your timing way down.
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93 Cobra #4563 347ci 12.0@118 505rwhp 524tq
90 GT "Saleen Cobra" style convertible 347ci
67 GT "Eleanor" style coupe 347ci
Posts: 1425 | From: San Jose, CA | Registered: Jan 2003
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Wildfire532FB
CAFords OG
Member # 1482
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posted
quote:
Originally posted by ported8650:
did you remember to put 87 in the tank?
You mean 91...
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68 Fastback
84 CJ7
94 HMMWV
95 GT
03 F350
17 Fusion Hybrid
Posts: 17578 | From: 530 | Registered: Jun 2002
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89saleen
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Member # 3083
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posted
quote:
Originally posted by Mrk50LX:
anyone have any ideas on how or what to fix
Try a different smog shop.. mine didnt pass and then I went down the street and it passed.
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Its over Johnny-
Posts: 316 | From: Palo Alto | Registered: Jul 2003
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Mrk50LX
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Member # 5147
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posted
Found the EGR isn't working. Going to get it fix Friday.THanks for all the info
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92 LX conv W/M&M,and Maier Racing Suspension components. MAC Headers and 2.5in MAC exhaust.70mm MAF 65mm Throttle body
Posts: 34 | From: Fremont, CA | Registered: Dec 2004
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