I have firestones up front also, and I've never experienced that.. are you positive nothing rubs the bag maybe while turning, like the brake caliper or anything? Make sure man.. and let us know what's up.
do you have an s10 with sd cups...or cups that bolt on? if you do, then cut the bolt off and let it ride. bolts on the bag brackets cause biding and popping in the suspension. it also causes sqeaking. why we dont send our brackets with bolts. if you dont have bolt in brackets.......i have no answer for you
mine makes a popping sound when i lift my front up but thats because my upper bag plate gets a little caught on my upper control arm id check to see if thats whats up
Does it do it all day long or after you lift it for the first time, it "pops" and then goes away till you drop it again? If that's the case don't let all the air out when you drop it. Leave like 20-30 psi in the bag. My stones would make a pop noise if I had the bag completely empty because it can pinch off half the bag at the first bellow and then when it gets enough psi it would "pop" and fill up the other half. Especially on heavier vehicles with bigger diameter bags.
the upper cups on my fullsize slide around a little bit in the spring pockets and make a little clunking noise when i first lift it up...maybe thats what you are hearing
ihave 1996 mustang ,ihave cool ride from art and and i had for about two year now and it just started last week, i think it might be my bags moving or struts, when i hit the gas it pops and when i turn some times it makes the sounds.