1995 Dodge Ram pops backfires through exhaust

No codes replaced spark plugs plug wires cap rotor cam sensor ignition coil verified fuel preasure is good swaped tp sensor with good part checked egr operation ok truck did not have this problem before engine came out to replace leaky rear softplug also checked all grounds and for pinched or damaged wiring oh ya when you unplug the tp sensor it doesn't backfire I verified power ground and sensor signal from tp all ok