What causes a car to stall when you put it in park or turn the wheel sharply and is now starting to hesitate when pressing the gas pedel?

Answer 1

Engines run on a gas/air mixture. A computer controls the gas/air mixture. The computer acts on information it gets from all kinds of sensors. Placing a transmission in gear changes a condition that increases the load on an engine and the gas/air mixture needs to change also. Shifting into park will decrease the load on the engine and a sensor must tell the computer of the shift, thereby changing the gas/air mixture. The engine may stall if the mixture is too rich. Much like the old time engines that flood the carburetor if you pull out the choke causing the engine to stall. When the steering wheel is turned sharply, once again it sharply changes the engine load and the gas/air mixture may not be changing fast enough to compensate for the load change, thereby stalling the engine. However, your problem could only be the gas supply. When you press the gas pedal the computer sends a signal to the injecter(s) to increase the gas in the mixture and if the gas supply is restricted [a clogging filter], the engine should hesitate. Try the filter first.