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Q: hesitates,popping noise, trying to get gas then goes along fine on 1998 Dodge Ram Van 1500

the d code said it was o2 sensor, replaced the primary bank1 sensor1 still starts chugging along engine pops a bit when i pump gas pedal it will sometimes just start going again until i begin to slow down, when up to speed 50mph plus runs fine.Mechanics keep saying it could be a number of things how do i narrow it down to the actual problem
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The popping noise usually indicates and ignition problem such as a fouled spark plug or defective ignition wire. Start with the basics. Spark Plugs, Ignition wires, distributor cap, rotor, Fuel Pressure, Compression.and don't forget the fuel and Air filters.
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