I've been getting a code for #4 cylinder contribution balance, so today I decided to unhook the injectors and buzz test them one by one. ( I don't have ae). The way I see the engine configuration it's odds on the passenger side evens on the drivers front to back facing the front of the truck. Correct? Weird thing is everything buzzed the same, about 4 clicks each except for 6. 6 did nothing. Not even a click. Is this a bad way to test them? Do I need ford or someone with ae to test them properly? The fact that 6 didn't even buzz at all bothers me.