1996 Nissan Sentra Failed smog due to timeing and emissions

1996 NISSAN SENTRA
186,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JEANMD
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Why would my car fail smog? What can my mechanic do to repair these problems?
Aug 27, 2008 at 7:49 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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