i got a 2001 monte carlo ls and this car is just problems. the big one is that my car is stalling when im at a light or stop sign and takes forever to turn over. also the other problem is im hearing knocking noise in both the top and bottom of my engine. im hearing from different people that i need a new engine and im wondering if anyone knows any places to get an engine and wht they usually run. the stall problem i got no idea so def need help