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Bogging

1993 Plymouth Voyager LE 3.3 V6 Automatic
Bogging down when entering an incline, keeps running in idle, will bogg down, if dropped in low it will take off, sometimes backfires. Runs very good when on level ground. What can it be, mechanics suggest fuel pump, transmission, had it checked out by my mechanic and the fuel pump is fine, doesn’t seem to be the transmission either. Has anyone else had this problem?? What is wrong and what the FIX?

Backfiring or popping in the intake plemumn is usually do to a misfire on this engine. Start with the basics, spark plugs and spark plug wires. It is probably due for a fuel filter replacement also.

Partially plugged catalytic converter can also result in bogging.