i'm running 1.8 oh dual coil. I thought lower ohms req. lower temps to heat up.. i'm still confused
Well I believe there are a couple factors. 1. lower ohm coils do need more power to run than higher ohms. There's more (thicker wire) wire to heat up than higher ohms which use thinner wire. This is why you can't run a low ohm coil on an ego. Not enough power from the ego to heat the coil enough. 2. Dual coils = more wire to heat up. So a single coil wrapped to 1.8 ohms would require less power to heat up than 2 coils wrapped to give 1.8 ohms total. That's an extra coil that needs to be heated up so it's more power that needs to be used to do it. Make sense?
Then there is also the factor (not in the case of your wrap but just an FYI) that thicker wire will take more power to heat up than thinner wire. So if you want to wrap, say, a single 1.5 ohm coil & you use 28 gauge wire for the coil it's going to take more power to heat that coil than it would to heat a 1.5 ohm coil wrapped with 32 gauge wire.
Big Screen D could also be correct though & you may just need to clean your connectors.
Also the higher volts you're using will drain your batteries faster than lower volts since that resistance/volt combo is a higher watt. a 1.8 ohm coil running @ 5 volts is 13 watts. I think an average wattage for a lot of vapers is 8-10 watts, give or take.