335 EGR sensor - where is the sensor?
176 Oxygen sensor - mixture too weak,sensors are 4 months
old.
336 exhust pressure too high or EGR sensor circuit voltage
too high.
337 EGR sensor circuiot above maximum voltage.

Car is bucking and misfiring under accelerations,I had a pluged cat in bank 1 before,am I getting another pluged cat(s)?also my AFS reading is around 8 at idling while it should be 6 according to my machanic.

95 v6 manul

I would think that either your main cat is plugged or you have a bad DPFE sensor.

The DPFE is mounted low on the back of the rear head. It has two hoses running to the EGR tube (steel tube from the exhaust manifold to the EGR valve). You can measure exhaust backpressure from the usstream nipple. If exhaust whistles out of the nipple under force, there is no question.

The front lean code may be from an intake manifold leak. If you have not replaced the intake gaskets I suggest that you do so.

For a 95, would any of those codes indicate a TB cleaning is in order?