Fuel Injector Problems (I think)
 

So I've got a misfire on my 93, pretty sure cylinder #2 is the culprit since unplugging that plug wire at the distributor has no effect on idle. I changed plugs, wires, cap and rotor and, of course, it's still rough. I've got my bets on it being a bad injector and was wondering if anyone could give me a ballpark estimate as to how much I should expect to pay if that's the case. I'm planning on taking it to a local shop tomorrow and want to make sure they don't give me a ridiculous estimate. Also are there any quick tricks to making this diagnosis that I could do before bringing it in? I've got no codes or check engine lights or anything.