
Not sure it's the best way but get a piece of chain a foot or 2 long drop it in the tank.
Get some water in the tank and slosh around, repeat, repeat until it's clean and free of debris.
Remove chain, then use air to blow in tank to try and get as much of the water as you can out.
Then get a few bottles of rubbing alcohol. Put one in at a time sloshing around to help get rid of water, repeat blowing tank with air.
I assume the 4 banger has the stock carb? If so there should be an internal fuel filter where the fuel line connects to the carb.
You may want to temporarily rig up an inline filter until your sure all the crap is out of the fuel system.
