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I replaced the little valve on the rocker cover already, are there any other components to the system that could get clogged? Also if there's no egr, what's the little pipe that connects to the last exhaust runner, the one on the cabin side of the engine?
#1 is the EGR valve on a M13a engine in a Jimny - IF FITTED - not all markets have them, you need to "eye-ball" your car to see if it's fitted, and that little pipe that you describe on the #4 cylinder exhaust runner suggests that your car does have it.
Look at the intake manifold see if you find the #8 pipe and follow it back behind the head.
First - depending on where you are tampering with the emission systems can be illegal.
That aside, most newer vehicles monitor EGR flow and will generate check engine codes if the flow is not what is expected, an 'EGR Delete" would need to remove these checks from the ECU software.
Non-functional EGR systems reduce carbon buildup in the intake, but increase combustion chamber temperatures and with it, the production of pollutants, primarily oxides of nitrogen. Engine damage (burned exhaust valves) is a possible outcome.
, right now I'm not home so I can't check the evap system