Not running right stalls almost wants 2ed gear no balls

1990 2.5L 4 banger. (just sold mine a 2002) I have 3.8L now. 2008
what transmission mine was 5speed manual stick , is yours?

ever do the 60,000 mile tune up, all service points under that column?
tune ups do work and have pay back in fuel savings.
" if in gas so much" i cant noodle that.....????
stall when , when you lift throttle and push in clutch.
when it stalls is everything !!
and when, coming to a stop light??????
and last and very important, can a fast right foot save the stall..?
i only have questions, and need all answers above, to proceed.
we can fix it. but i cant drive it and see all this.

my guess> ??????
engine starts runs perfect, right
but the all gears in the tranny are dead, car will not move.
so you see ball bearings under car.
CV joint failure, I bet you ignored the noises for a long time.
right?

It sounds like the transmission is slipping and the sensor is just reporting this info and setting a code, you have made a common mistake. You likely need a transmission overhaul

The pressure plate needs to be replaced...when working this allows the clutch to disengage, so you can manually change gears...Hope this helps.

Did this start all of a sudden ? after buying gas? If you are right about not getting enough gas ... perhaps you bought some REALLY dirty fuel. My '94 has a drain plug on the gas tank ... you might open that up and see if you get any gunk/water out of the bottom of the tank. After that check fuel pressure and those sorts of things.

You are probably going to need a syncro on third gear, trans has to come out and be taken apart.

Had the same problem - the train at first stopped moving, but still rotated the balls, then later stopped rotating the balls at all. The music still played, though. I found the issue to be a small belt that transfers the motion from the electric motor to the gear system. The belt is tiny (think small rubber band) and lost tension, finally detaching from the system altogether. Getting to it is the difficult part... mind you that taking it apart carries a very high risk of breaking the plastic, so be prepared to scrap the whole thing and buy new.
To fix, start by removing the 7 outside screws to essentially split the train body in half. You'll have to pry off the large green wheel that's opposite the screws (right side of train) - this part carries the highest break risk. Be mindful of a spring (about 1/2 inch diameter) that may go flying - that one goes on the outside of the little inside wheel that moves the balls around.
Once the train is split in half, remove all screws you find, which will allow you to remove the mechanical sections, which includes the battery pack, electric motor, on/off switch, and gear system, including the wheel that moves the balls around. By the time this entire section is lifted off the train body, you'll see where the gears (they're a bit greasy) are attached to the motor towards the bottom of the gearbox. The gearbox itself has 3 or 4 screws to address that will reveal the entire gear system.
I had to take the lower (smaller) gears apart in order to replace the gear belt.
Replace the gear belt with a small rubber band (you'll likely need a small screwdriver to wrap it around the wheels), then re-assemble the gearbox and system. i recommend constantly running the toy with every step to make sure everything's still connected.
with a healthy rubber band/belt in place, the rest of the gear systems will fall into place with enough torque to drive both the train movement and the ball wheel.
good luck

bad clutch

i take it that this vehicle has an Automatic transmission, if Yes then service it, there is a filter inside right at the bottom and it is blocked because it hasn't been changed for a long time