If your vehicle is showing engine stalls while driving at steady speeds, here are the most likely causes and the parts you'll need to fix each one.
The fuel pump can overheat or fail to maintain adequate pressure during sustained driving, starving the engine of fuel and causing it to sputter and stall.
These sensors monitor engine timing. When they suffer from heat soak during steady driving, they can drop their signal, causing the engine computer to instantly cut spark and fuel.
An incorrect air reading can cause the engine computer to lean out the fuel mixture too much, leading to a stall. This is frequently caused by an over-oiled aftermarket air filter contaminating the sensor wire.
If the alternator stops charging the battery while driving, the vehicle will run entirely on battery reserve until it depletes, causing the engine to die.
Ignition components can overheat during a long drive, causing a sudden loss of spark to multiple cylinders under sustained load.
A severely clogged catalytic converter builds up excessive exhaust backpressure during steady driving, eventually choking the engine until it stalls.