Vaccum leak?

[ka24deNewB]

I know for a fact that i have a Vaccum leak in my car. That's cause the rough idle. It's a 1993 with a ka24de motor with 221k.

Now i did the carb cleaner spray technique and i found that it was coming from some where on the intake manifold. Does anyone have an idea of what might the leak be at? Could it be the intake manifold gasket?

Need some help asap