Nissan Pathfinder Engine Runs Rough

It Shivers Sometimes When Am On The Road And Sometimes It Runs Smooth. Why And What Can I Do?

I Have A 1997 Nissan Pathfinder Put A New Air Cleaner On And Thought I Would Clean The Intake And I Removed Throttle Position Sensor....

The Pathfinder Has Began Running Very Over The Last Couple Of Days. I Replaced The Spark Plugs, Wires, Distributor Cap, And Rotor. It Runs...

My Vehicle Has Been At 4 Mechanics Cannot Find Problem, It Now Starts, Idles, But Dies When You Put It In Drive, You Can Put In Reverse Thou...