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Bought ($10, a gift) a 1993 Altima with 198K miles.
Drove it for 50 miles and then took the smog test:
15 mph CO2 .3, HC 63, CO .33, NO 923 (failed - max 701)
25 mph CO2 .2, HC 48, CO .23, NO 535 (passed - max 730)
All test were passed with the exception of the NOx.
Since this was a test only station they provide little help as to what to
do. A 2004 thread from this forum suggests that the problem resides in the
EGR system:
EGR tube plugged or O2 sensors or timing or manifold passages.
Does this sound right? do I need a mechanic to do it (I have basic tools).
Any help is appreciated
Drove it for 50 miles and then took the smog test:
15 mph CO2 .3, HC 63, CO .33, NO 923 (failed - max 701)
25 mph CO2 .2, HC 48, CO .23, NO 535 (passed - max 730)
All test were passed with the exception of the NOx.
Since this was a test only station they provide little help as to what to
do. A 2004 thread from this forum suggests that the problem resides in the
EGR system:
EGR tube plugged or O2 sensors or timing or manifold passages.
Does this sound right? do I need a mechanic to do it (I have basic tools).
Any help is appreciated