you said it works with the 801 atty - so the only other idea i had is that your carto might not be compatible. post your brand here and see if anybody else is using them successfully with an adapter. mine are ce2s, those work without a glitch
I think that might have something to do with the adapter center post. I can reproduce problem this with some CE2 R2's.
Adapters are designed with the center post being tapered on one end and flat on the other. I believe this is done so when they are assembled the tapered end allows it to be pushed into place easier. You notice on regular 510 devices the battery center post is flat.
With some CE2's this can cause a problem as the center conductor of the carto is reverse tapered. So it's kind of like.....
battery-> >-carto
.... with the carto side ">" possibly not extending down far enough to get a good contact.
You can try taking the adapter center post out and flipping it around so the flat side faces the carto. Be aware that the diameter of the flat side of the center post is really close to the size of the threaded connector of a carto/atty. This could potentially cause a short circuit, especially if the carto center conductor is not sticking out far enough (got pushed flush with the threads). That said, this is how I've had mine since day one and have not had any issues.
A note for flipping the adapter center post around: After you push the center post out, take the silicone insulator off of it (remembering it's orientation) and put it back in the hole in the adapter BEFORE pushing the center post back in.
Here is a pic of before and after.....
If anyone else is having firing issues that they think is not related to the above problem, I have solution for a possible button contact problem.
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a very strange thing just happened to me ..... i changed my battery and doing that i left the little trim ring on the endcap when i took that off. i screwed it back on and hardly any vapor!!!!!! 