I have a 93 mercury topaz 4cyl 2.3L that stalls while driving I have replaced the ecu, fuel filter, spark plugs and wires, and distributor cap and rotor, the fuel pump, fuel pump strainer, fuel pump sending unit, fuel filter, cam sensor, ignition control module, and the coil pack and the car sill stalls. The check engine light is off the and car is getting a good ground. What else can cause this issue?

I don't know who at "Ford" would have told you that!



Here is the description straight out of the "Ford" service manual for your car:



Crankshaft Position Sensor



The ignition system utilizes a Hall Effect Sensor to provide crankshaft position, base timing and engine speed information to the Ignition Control Module (ICM ). The ICM supplies this information to the Powertrain Control Module (PCM ) as the Profile Ignition Pickup (PIP ) signal. The PCM uses this information for fuel injector timing and calculating ignition timing advance and dwell.

CONSTRUCTION
The sensor is located within the distributor and is comprised of a hall effect switch and a camshaft driven 4 bladed shutter plate.

OPERATION
Each blade on the shutter plate corresponds to a separate position on the crankshaft. As the shutter plate passes through the hall effect switch the output of the sensor alternates from 0.0 to 12.0 volts in a square wave pattern. This output is sent to the ICM where it is converted to the PIP signal. I don't know who at "Ford" would have told you that!

Here is the description straight out of the "Ford" service manual for your car:

Crankshaft Position Sensor

The ignition system utilizes a Hall Effect Sensor to provide crankshaft position, base timing and engine speed information to the Ignition Control Module (ICM ). The ICM supplies this information to the Powertrain Control Module (PCM ) as the Profile Ignition Pickup (PIP ) signal. The PCM uses this information for fuel injector timing and calculating ignition timing advance and dwell.

CONSTRUCTION
The sensor is located within the distributor and is comprised of a hall effect switch and a camshaft driven 4 bladed shutter plate.

OPERATION
Each blade on the shutter plate corresponds to a separate position on the crankshaft. As the shutter plate passes through the hall effect switch the output of the sensor alternates from 0.0 to 12.0 volts in a square wave pattern. This output is sent to the ICM where it is converted to the PIP signal.

As it says under "Construcion" in the information I sent earlier, the Crank Sensor is actually located inside the distributor. (Under the rotor) It gets quite involved trying to change the sensor itself as the distributor must be competely disassembled to gain access to it. (I'm not sure if the sensor is even available by itself anymore..I would have to do some checking) Your best bet is to locate a "Remanufactured" distributor and replace the whole thing as a unit. As it says under "Construcion" in the information I sent earlier, the Crank Sensor is actually located inside the distributor. (Under the rotor) It gets quite involved trying to change the sensor itself as the distributor must be competely disassembled to gain access to it. (I'm not sure if the sensor is even available by itself anymore..I would have to do some checking) Your best bet is to locate a "Remanufactured" distributor and replace the whole thing as a unit.