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Did some research on your vehicle on Identifix and the transmission seems to be a common problem. Sounds like you were on the right path with the transmission service. Possibly a torque converter shudder. Unfortunately the only way to fix was to replace the transmission. Might just drive it and see if eventually it goes away as the new fluid works its way into the torque converter. you did good by using the honda fluid. thats the only fluid i would put in a honda transmission. Also if this is a AWD you could Remove the driveshaft to the rear end and see if the shutter goes away. If so then look into the rear end for your shudder.
As cheap as spark plugs are you should put a new set in first. how did you test the coils. sounds to me like an ignition misfire. Is the check engine light on? might check for codes for a direction.
You can probably do it if you get crafty. I’m sure you can rig something up to hold the transmission up but I think you will find in the long run it will be much easier to just pull them together.
If the MAF was dirty it would cause the engine to run lean. It would underestimate the amount of air coming into the engine and there for run lean. The MAF can get skewed internally and overestimate the amount of air. in general on scan data you want to see the MAF estimating about one gram of air for every 1 liter of engine volume. so if you have a 2.3L you should see around 3 grams of air flow at idle from the MAF. Also to test for a dirty mass airflow sensor. you can use a multimeter that is backprobed into the signal Wire on the MAF. Do a snap WOT and record the voltage. you should see around 4V or more.
Obviously a bad 02 sensor could also cause this. You should see a change if you create a vacuum leak. What i would do is reset the learned adaptations and remonitor the fuel trims.In my opinion OEM is always the best option if you can afford it. Theirs nothing like what originally came on the vehicle. However I have replaced many CV axles from the aftermarket with little to no comebacks.
Maybe this will help you understand.
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=46&s_kwcid=AL!3756!3!72454646413!e!!g!!tire%20size&ef_id=VmuRDgAABPwt2Atu:20151212031422:sAlso the spark plug pictures they show you in those c picture charts are usually extreme conditions. Most modern cars dont have near the problems that cars 40 years ago did, which by the way is probably about the time those charts were made.
How much oil does it use. its a 1994, car probably isn’t worth diving into the engine. If it only uses a quart between oil changes just keep checking the oil and make sure its full and then drive it till the wheels fall off.
Also the PCV valve should seal in one direction and allow flow in the other. so you can blow through both ends one should let you the other shouldn’t.Could you explain more about what your problem is and why you want to try and clean the cat? Most likely wont work and could damage the cat if it is still working correctly.
I did some research on your vehicle. their should be a coolant temp sensor near the thermostat housing where the lower radiator hose connects to. this is the temp sensor for the radiator fans. with the key on jump the two wires together and see if the fans come on. If they do most likely the sensor is bad. you would need a scanner that can look at live data to see what the temp sensor is reading. the wire colors should be white/green and Black
A couple of thoughts. Are you sure you got all the air out of the system? Have you put a new thermostat in? Is the coolant temp sensor reading the correct temp? Is the water pump pumping. have seen many impeller problems on pumps. Are the fan blades blowing air toward the engine? you would be surprised at what I’ve seen? If all this checks out you might be looking at a bad head gasket allowing combustion gas into the cooling system.
so even though the starter clicks, your saying it still starts as normal even when it clicks? or it clicks and then eventually it will start?
well then you will need a scanner that can view data. Coolant temp data is an OBD 2 mandated pid and it will be their with any scanner that can show live data. Is the security light flashing. Also sometimes on European cars you may try disconnecting the battery and touching the two cables together to do a hard reset and then reconnect. you would be surprised how many times this has fixed weird things like that for me.