I am not sure if this is a silly question or not, but here goes. The injectors on my 305 TPI click incessently with using "regular" gas but not so much with "premium" gas. My question is why is that clicking going on and is it possible my injectors are bad? I also don't constantly switch types of gas, I just did an experiment to see. Thanks.

 

The clicking is the injectors doing their normal job. Nothing to worry about.