I have a '94 accord LX 5-speed with 111k miles. When I drive above around 70ish mph, the car starts to run a little rough, it begins to shake a little. There is no CEL light on and the oil was just changed. It seems to run fine under 70 mph and at various RPM's. It does seem to idle slightly rough lately, but NOT badly. The temperature gague is not reading hot when this problem occurs. This car seems like it may have sat around for a while before I got it. Thanks to anyone that can help/ reads this!

Hi, you could check your engine mounts.

Hi,
What was serviced a few weeks back? Sounds like it needs a tune-up @ least to start - spark plugs, plug wires.

At 103K miles I'd also replace the fuel filter, air filter, PCV valve. And if you look in the Owner's Manual it should have a maintenance schedule for other items that may need attention.
GL,
TD

run the fault codes and look for problem cam or crank position sensor
could be a problem engine mount that is being started by a misfire

If it's running rough, chances are that it's misfiring. If the Check Engine light is flashing/blinking, it is definitely misfiring.
If that's the case, drive it as little as possible... Or straight to the mechanic because the more you drive it while it's misfiring, the higher the chance is of you ruining your catalytic converter.

I’m happy to help further over the phone at https://www.6ya.com/expert/jason_00b31cc8f593773a

cv joint in drive shaft is bad

I had a 94 sunbird and when we stopped, it would start running a little rough and the speedometer on the dash would start raising up sometime to 20 mph, and the car was not moving. I finally took it to a shop and they said it was the voltage regulator which was built into the alternator. They changed the alternator and we never had the problem again. The speedometer on the car was controlled by and electric circuit not a cable. You should have the code checked it can help diagnose the problem. Most auto part places where I live will tell you the trouble code for free with their code reader.

sounds like the speedometer cables of old, but i am not sure if your car has one, if it does bingo

nah, I have over 203miles on mine. Still has a way to go. Check your plugs for the dying. For the shaking, try a tire rotation. Could be the tires as well. Have you hit any curbs recently?

have you try cleaning also the air filters..? fuel pump..?