I don’t like acidity in my coffee much. Stuff I get from my moka pot on the other hand was always very acidic.
Recently I bought a bag of very good, beautiful smelling beans from my favourite coffee shop and brewed it on moka pot. The results are still the same, it almost tastes like lemonade. It is undrinkable amounts of acid in there.
I use the 1zpresso Q Air. I tried nearly every grind setting between 1.6-0.9 (chart, please click). Always the same result.
I also tried starting with both hot and cold water. No difference.
I do not tamp my coffee and flatten it nicely by shaking the basket. I don’t overfill the basket.
My moka pot is 2-3 years old and I might need to change its gasket, wonder if that has anything to do with it but i doubt it since the gasket still seals pretty good except for a 5-10mL water leak every brew.
Mokas are a finicky beast. I’ve had it make some of the worst and some of the tastiest cups I’ve had. Is it acidic or bitter? It’s easy to burn it, but that doesn’t sound like the problem. I’m guessing it’s too fine. Every bag I got had to be individually dialed on, but in general I found a grind much more similar to drip/ pour over worked best. I’d try that. Fill your filter up to where there’s a good mound and lightly tap down with a spoon.
Also, have your changed your filter and gasket that go into the top portion? Those can get old grinds stuck in it easy that can taste off.