Why would my 1994 acura vigro misfire and sputter I changed the sparkplugs but not wires I would like to know all reasons for it

misfires are from plugs, HT leads, injectors, low fuel pressure , compression problems,coil/s distributor cracks /dirty,rotor button ;loose, faulty ignition control module, loose earth/ground wires, low alternator out put, bad battery
I suggest that you run the fault codes to try to pinpoint the problem area.

looks like that either you do have an air mass not correct working,or the throttle body is too dirty and you have to clean it.Also check for any cracked, snapped vacuum hose.

First the po 171 is that bank 1 is running lean, as far as the codes po104-106, i think you made a mistake, the mifire codes for cylinders 4-6 would be po304, po305 and po306. the fiurst thing to check would the fuel preasure.

The reason i say fuel pressure is due to the misfiring and lean codes.
If the fuel pressure tests okay then check for intake manifold gasket leak, this is done with a smoke machine or with some throtle body cleaner spray. you will neeed to start the engine and spary around the intake gasket area as you watch for engine speed change.
A scan tool may be needed to watch fuel trim and o2 readings if the intake leak is small.
The other problem could be sparkplug failure or bad coil and last sparkplug wires if this is not a coil on plug system.
Acoil on plug system would be a system with out sparkplug wires going to each sparkplug, instead there is a separte coil on each sparkplug.
If this is a coil on plug ignition system i would start there and swap coils with the other cylinders and see if the misfire moves to those cylinder if it does then bad coils. hope this is helpful , good day

For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

Thanks.

REPLACE DISTRIBUTOR CAP AND ROTOR REPLACE SPARK PLUGS AND WIRES IF NOT BEEN CHANGED IN LONG PERIOD OF TIME.CHECK IGNITION TIMING.CHANGE AIR FILTER CLEAN FUEL INJECTORS.IF ENGINE STILL MISFIRE IGNITION COIL IS WEAK OR YOU HAVE LOW CYLINDER COMPRESSION.

get the check engine light code first. this should give u a good direction of where to start. could also be multiple other problems but start with the obvious check engine light first.

This sounds like bad sparkplug wires, pull wires off the plugs and see if oil is on wires, this is common on these cars the valve cover gasket goes bad and oil leaks into sparkplug holes and then it misfires, if theres oil in holes replace the wires and the valve cover gasket with the tube seals,

This sounds like it needs the plugwires or coilboots replaced, the ignition system has sparkplug wires or it has coilpacks on each cylinder, it sounds like they or misfirimg, you can have the computer scanned for codes to find out what cylinder is misfiring, many autopart stores will scan the computer for free,

remove the valve covers and check the spark plug seals .. maybe theyre old and brittle and need replacement.. maybe arent sealing well and allowing oil down to the plug

try buying new points (yes there called points) gap them then install them, they go under the distributor cap, by the condenser, also, the sparkplug wires go in a certin order so if your not sure call an michanics shop and tell them what kind of car you have and they'll tell you what order they should go in. also did you gap the spark plugs??