Other mistake: As Plisken escapes in the hijacked chopper, Quervo Jones picks up a bazooka and prepares to fire on it. As Fast Eddy shoots him through the chest, watch the bazooka. You can see right through the barrel. In other words, there is no ammo in the weapon. (01:25:05)
Continuity mistake: In Escape from New York, Snakes tattoo on his stomach is filled in. In Escape from LA, his tattoo is just an outline. (00:18:05)
Other mistake: When Snake starts up the sub, the turbine is referred to as being at 75% power. The display shows "0.75" which is 75%, but there is also a "%" symbol above the numbers. Either the display is bizarrely constructed or the power output is stated incorrectly. (00:21:20)
Continuity mistake: When Cuervo takes out Snake with the bolo on the racing cars, Snake falls to the ground; he is wearing his leather coat. When the camera shows him hitting the ground, the coat is completely off one arm, allowing it to be slipped off by the bad guy. (00:33:25)
Factual error: When Snake crashes the chopper in the final scene, it is going down nose-first, and just the nose hits the ground. The explosion area would be (approximately) 10 sq. feet and expanding outward from that spot. But the initial explosion is down the whole length of the chopper with the grass exploding into fireballs. (01:27:20)