there might be a leak some where in a coolant line. or maybe you have a leak in your radiator.
timing is wrong, coolant leak, bad radiator or thermostat, head gasket....
a small evap leak would not cause your car to jerk.
you shouldn't have to keep putting PS fluid in your car. There is probably a leak that should be repaired.
vacuum leak.
I would not expect a valve cover leak to cause a car to stall. A valve cover leak can fill the spark plug area with oil which can cause rough running.
No.
A vacuum leak can cause that.
Any fuel spill,storage or leak can cause fuel odor inside the car.
probably not you have a gas line leak
No...
In short......yes