blinds 400/800
utg limps in (16k)
mp limps (25k)
sb completes (2.9k)
you in bb (7.9k)
all chips at start of hand before posting
flop comes 235 rainbow
sb moves in
you have q4o
do you call/push/fold ?
My first thought was why do you want to go all in here ? You get rid of your potential customers who you want if you hit your draw and you dont get fold equity because your opponent is already all in. The question is have you got odds to draw ?
Lets assume likely best scenario. You call, others fold and, sb doesnt have a 4 and if you hit a queen you win. Perhaps sb has something like J5?
You now have 11 outs - 4 aces, 4 sixes and 3 Queens - total 11 outs with 2 cards paid for - 43%. You have to put another 2.1k into a pot that will be 7.4k. -28% - very good odds.
However he could have a 4 when it would be split pot if the draws come . If not depends then on his kicker. You could be winning already.
So against 1 opponent you you a few ways of winning - If more than 1 you will probably need to hit your draw.
So I think all in discouraging others to come in. If you loose you still have 6 blinds left. But if others also call you hopefully still have 8 outs with 2 cards to come (32%), and if you hit you'll more than double up and be right back in it.