2006 Nissan X-Trail

Noises problem
2006 Nissan X-Trail 4 cyl Four Wheel Drive Manual 162000 miles

Every time when I start the engine in the morning the car has a strange and strong noise and there is more smoke coming from exhaust after it get worm I can hear less.I had tray to many times putting additive for fuel but still this noise is there. Please, if you can help me regarding this problem.
January 28, 2010.

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