I m having problem with my crippled limbs. Cripple limbs supposed to heal by stimpaks or eventualy doctors right ? Well I m playing on survival mode the most difficult level but still when I got crippled my limbs auto heal in 10 -20 seconds how do I fix this?

It is probably because you are playing in survival mode. I remember the stimpacks acting like that in FONV when playing in hardcoe mode.

My point is that it must not auto heal crippled legs , Survival mode is the most difficult mode is a gameplay so its not as hardcoe mode in New Vegas , It supposed to be get tougher but auto heal doesnt seem to me tougher I thinks its a bug don't you think

I think its a bug. i am playing on normal and my limbs are healing too.

Normaly it should require a Doctor or stimpak to heal crippling.

Exactly !! , how do we fix it ?

I dont know.