Check oil level.
Check that the engine is warm enough (maybe blown thermostat).
If not then you should have a check engine light.
Short the service connector and count blinks and figure out what's wrong.
Do necessary repairs.
You could, but because the '94 Prelude is heavier than the '89 Prelude, it doesn't make sense to swap in a smaller powered motor.
Yes
yes
it could be the fans motor
Yes, it has an interference motor.
Yes you can I have 1988 Honda prelude with the 2.0L in it.
Yes, but it will require a large amount of customization.
Provided the '97 Prelude is a base model, then yes it is possible to swap in an H22a variant. The Prelude Type SH motor is different as the ATTS unit is connected to the motor. So, the only compatible H22a motors would be one from another Type SH, or the JDM Honda Prelude Type S motor.
Yes, the h22 is a interference motor.
B20a6
its the motor.
Are you talking a stock motor and what year is the car and what motor does it have in it