Originally Posted by wiredFocus
do they feel hard? like the last ones? They should prime as soon as oil starts flowing thru the engine. So they should already be primed if you have started it.
Sounds like from the backfire, it could be misfiring. You could try and run some premium fuel thru it, to see if the noise is reduced or gone. Make sure the plugs are the right ones and still look good. The key here is to continue to narrow the problem down.
I'll pull the cover again tonight to see if they feel hard. Also, another buddy told me to make sure it isn't an exhaust leak. He said he's never heard one that sounded quite like my car does, but he's heard some leaks before that he could have sworn were valve train issues. I'll try to check both tonight.