The goop came out of the rectangular air compressor, not the canister or fill hose?
That would mean the goop was flowing backwards into the air pressure hose, as if the tire valve was providing more resistance than the air compressor!
Perhaps you thought you had the hose fully screwed on and compressing (opening) the valve stem,but did not.
In that case the goop had nowhere to go except backwards into the compressor. Hence the smoking, etc. That the goop sprayed out the hose after removing from the valve stem also leads me to believe the goop was not going through the tire valve, it was all backed up and pressurized in the hose instead. Think of taking a nozzle off the end of a pressurized water hose. The water sprays everywhere. Take an open nozzle off, it does not spray water everywhere.
I think the goop either was not going into the tire or the valve somehow closed. Did the dealer find goop inside the tire?
That would mean the goop was flowing backwards into the air pressure hose, as if the tire valve was providing more resistance than the air compressor!
Perhaps you thought you had the hose fully screwed on and compressing (opening) the valve stem,but did not.
In that case the goop had nowhere to go except backwards into the compressor. Hence the smoking, etc. That the goop sprayed out the hose after removing from the valve stem also leads me to believe the goop was not going through the tire valve, it was all backed up and pressurized in the hose instead. Think of taking a nozzle off the end of a pressurized water hose. The water sprays everywhere. Take an open nozzle off, it does not spray water everywhere.
I think the goop either was not going into the tire or the valve somehow closed. Did the dealer find goop inside the tire?