If the coil is continuing to glow red while firing it up then you probably are not getting any wicking up to the coil. It could be that the wick is kinked. Also if you have a multimeter take the voltage as it pass between the posts. If there is a voltage drop it could be that you need to carbon up the coiled area of the wick a bit more. Also make sure the coils are not touching against each other.
One other thing that I have noted is if the viscosity of your juice is thick it will reduce the wicking. In one of my juices I thinned it by an additional 5% and it made quite a difference.
Im using bobas bounty, its all VG so its pretty thick. There is no kink in the SS wick, its nice and round. The coil looks perfect, not touching eachother or shorting out on the wick. I even tried dripping 5 drops of juice right on the coil/wick and taking a puff, but its the same thing. Really strong throat hit, ok flavor, but almost no vapor.