First off... Who did you buy it from? I received 4-5 bad ones new, back when they first came out. However....
There should be a coil cover on the bottom of it and these tend to fill with water and mud and can cause bad coil issues. You will need to gently remove this coil cover by prying slowly all the way around the front or back with a dull flat object. If removing debris does not fix it proceed to the next step...
Does it behave differently if you wiggle the coil connector at the coil? If not proceed to the next step...
Remove the coil connector off the coil cord by depressing the small square tab and slide the coil connector housing down towards the coil. Now push and bend and twist the wire trying to duplicate or alleviate the problem. If this does nothing remove the hot glue carefully and inspect the wires to make sure nothing is touching and check the coil at this step. If nothing is grounding out than try the coil again. If still not working proceed to the next step....
You can always send it back to Bulgaria or you can strip the end of the coil wire back behind the strain relief (the metal pinch tab inside the connector) and solder the connections.
Sending it back is pretty much a sure fix and it may not be the connector, but it has been the connector three times for me and mineral buildup once in the coil cover.
I hope this helps.
