1991 Nissan Truck Smog Test Failure

1991 NISSAN TRUCK
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BILLF106
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  • 2 POSTS
Earlier I had asked a question about my truck not passing smog test, I pulled the plugs, and they almost look brand new, however with the engine running, I went back by the tailpipe and I could smell gas, there is also black carbon all around the edge of the tailpipe, what do you think?
Feb 13, 2006 at 6:30 PM
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FISHERMAN
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  • 937 POSTS
Its your "check engine" light on?
If its on, you have a bad sensor,
but if its "off" then you have to check your catalityc converter, when was the last time you replace it?
and how many miles has the truck?

Manuel.
Feb 14, 2006 at 8:53 AM