Problem with the Honda Accord 92 Exi

The problem is that when it starts, its rpm begin to rise and lower between 1000 and 1500 rpm, constantly, it is as if one were \ "accelerating and slowing down \" constantly. Can anyone guide me? Thank you already.

It is usually some broken hose in the multiple of admission for which I suck air I suggest you check them

Or that or failure in flower flow or MAP sensor, or cold starting valve full of shit that does not let enough air pass.

Anyway the two most likely options are broken hose and idle valve.

You should say if the fault light is turned on and if it also does it hot or on the contrary the effect disappears when the engine takes working temperature.

The Opel Astra F, Asconona, Vectra A, Kadett E, Calibra and others happened to them a lot about the idle valve.
You just had to clean it and pull miles.

All the best.