Opticsman25 Posted April 5, 2010 Share Posted April 5, 2010 Hello all, Just join the forum. I have a 92 Lexus SC400 and have smog issue. Any help would be greatly appreciated. This is what I have done to try resolved the smog issue: Install all the spark plugs NGK - Spark Plug Part Number: 3764Iridium IXDOHC Per Car Quantity: 8Gap @ .0441. Install New PCV Valve Cleaned air idle control Cleaned throttle body Did an oil & air filter changed New Cat 2 New Oxygen Sensor (upstream) Other minor issue. No illumination on the idle needles Heater turn on, it blows but no heat TRAC Control light is constant on. Aside from the issues, the car ran awesome. Quote Link to comment Share on other sites More sharing options...
soarer08 Posted April 8, 2010 Share Posted April 8, 2010 Hello all, Just join the forum. I have a 92 Lexus SC400 and have smog issue. Any help would be greatly appreciated. This is what I have done to try resolved the smog issue: Install all the spark plugs NGK - Spark Plug Part Number: 3764Iridium IXDOHC Per Car Quantity: 8Gap @ .0441. Install New PCV Valve Cleaned air idle control Cleaned throttle body Did an oil & air filter changed New Cat 2 New Oxygen Sensor (upstream) Other minor issue. No illumination on the idle needles Heater turn on, it blows but no heat TRAC Control light is constant on. Aside from the issues, the car ran awesome. Eh cannot really think of much else that could cause you to not pass the smog. Course I live in TX, i know we are no where near as strict as yall are there. The needles in these cars just go bad man, along with the display for the AC, mine just doesnt light up nemore, and i have no needles cept for maybe a random flicker every now and then. Mine doesnt have trac control, so cant help you there either. Heater? check fuses, simple things first. Hope that helps a little Quote Link to comment Share on other sites More sharing options...
soarer18 Posted April 20, 2010 Share Posted April 20, 2010 did uget a OBD2 magnaflow cat? or simply a regular cat? Quote Link to comment Share on other sites More sharing options...
Opticsman25 Posted April 21, 2010 Author Share Posted April 21, 2010 did uget a OBD2 magnaflow cat? or simply a regular cat? I don't know if the CAT is OBD2 OR regular CAT. Does it makes a difference? Quote Link to comment Share on other sites More sharing options...
sc300boosting Posted May 2, 2010 Share Posted May 2, 2010 what did you actually fail for. there is three part to the smog check. the visual,the functional, and the emission. if you would post a copy of your test result maybe i can help. Quote Link to comment Share on other sites More sharing options...
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