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Old 05-10-2012, 11:33 AM   #17
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 41,354
 

2003 L-Series 3.0L Sedan
Default Re: Rebuilt Transmission, Now Fails Smog Check

If I'm not mistaken, lead and silicone contaminates O2 sensors and kills them. There are youtube videos on testing them with a propane torch to heat them and measure the <1 vdc output. Between 0.1-0.9 vdc would indicate a good one. Mileage over 150k+ may be another way to determine replacement. If so, its been recommended to use OEM only for best use. I don't think coolant kills catcons.

There are California members here that may help with specifics to get yours past emissions. Hopefully they'll have some input.

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