The TPS (throttle position sensor) has gone bad on your throttle body.
Dirty fuel filter
to much of it can stop our system
There are several reasons an engine may stall while driving, here are three.The fuel tank is empty and the engine is starved of fuel.Not enough power to climb a hill causing a stall.Faulty or damp electronics on a petrol engine can also cause a stall.
What causes a 1997 Pontiac sunfire gt with a 2.4 liter engine to stall when stopped at a light
The year, make, model and engine info would help but a serious vacuum leak could do that.
possible bad TPS, IAC, or ECT sensors
The crank sensor probably needs to be replaced.
More info such as the year and engine size would help.
Your Mercury Cougar might stall in reverse because of a problem with a bad crank sensor. This problem could also be due to the crank sensor wires which are damaged or not wired correctly.
my van stalls while im turning or coasting no one seems to know why can you help me its an automatic
Need to know the year and make, It would help answer.
Removing the oil cap with the engine running causes a vacuum leak in the positive crankcase ventilation. This causes too much air to enter the cylinders at once, which results in a stalling engine.