wannacar, on 06 February 2012 - 06:38 PM, said:
should i drive it alittle before taking it in there? should it be hot or cold?
Never take a car in for smog cold, the CAT needs to be hot to keep the NOX levels low. Drive it around on the freeway for a good 15 - 20 minutes to get the CAT hot, then take it straight to the smog shop. Try to minimize any long stops so the CAT doesn't cool down too much. .






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