edit:
Solved: Christ.. I put %i instead of %f SORRY!
Below is how I see it used when looking at examples, but for me it just prints:
1107723518
1107948770
PHP Code:
public printC4Timer()
{
new c4 = fm_find_ent_by_model(-1, "grenade", "models/w_c4.mdl")
new float:explode_time = cs_get_c4_explode_time(c4) - get_gametime( );
client_cmd(0, "say %i", explode_time)
}