Sounds like the timing could be a little out of whack, when in park there is no load and the base idle is good, but when under load there is a vacuum advance issue and the timing is just out enough to cause the sputtering. Check the cap and rotor for any signs of cross firing or arcing inside the cap, hooped rotors will also show this arcing as witness marks on the rotor.
Look for a hole in the PCV valve hose on the backside of the engine.
MINE WAS DOING THE SAME THING AND IT WAS THE EGR VALVE!! THAT FIXED IT AND IT'S RUNNING GREAT!!:)GOOD LUCK
Zephyr essentially means a gentle breeze (traditionally blowing from the west).-It would take more than just a small zephyr to push the sailboat.-The light zephyr breezed through my window, tickling my cheeks.
It may be a EGR valve issue. This valve is normally closed at idle and opens at about 40mph.
because itt needs to be work on
A sparkplug misfiring.
mmHg means millimetres of mercury. You wouldn't normally say it normal conversation but if you did you would say it in full.
Yes it can.
Incorrect ignition timing or damaged valves would make a 95 Honda Odyssey sputter and backfire. Backfires are directly caused when ignition occurs at the wrong time.
lack of fuel
have you ever changed the fuel filter ?