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Which Hall-Effect sensor (stator) is in your distributor.
From left to right. New aftermarket stator, Used OEM stator, and New OEM stator.
New aftermarket stator (left) vs. New OEM stator (right): The most important thing that you can't see would be the wire wrapping around the magnet. The magnet on the OEM stator is more powerful than the aftermarket stator. Why is this important? Because it's this produced signal that's used by the ECM for crankshaft position and where the ECM computes the desired spark advance based on engine demand and calibration.
It may be hard to see in this picture (aftermarket on the left and OEM on the right). The internal diameter on the OEM pins is smaller which will make a better connection. The larger diameter on the aftermarket pin will have more resistance (looser fit) and could be another reason for their failure.
Pictured below is the ground for the OEM harness which is made of better materials (tin-coated copper for the OEM and brass for the aftermarket).
The OEM harness has a heat barrier/sleeve for their wires, not sure what's on the aftermarket harness but it could be heat-shrink. Not sure if that's a problem but the OEM piece looks to be more robust.
Why is this important? Because it's becoming increasingly difficult to find a quality stator for those of us that use a distributor. The lack of a quality stator could affect the drivability, reliability, and performance on your Mustang. Stators for the 1987 to 1995 Mustangs are no longer produced. Which increases your chances of purchasing a knock-off (counterfeit) stator. Can't speak for 1987 to 1993 packaging but original 1994-95 Ford Motorcraft stators come in a bag with semi-cut holes at the bottom of the package on both the left and right side (front and back).
I hope this helps
Michael Plummer
From left to right. New aftermarket stator, Used OEM stator, and New OEM stator.
New aftermarket stator (left) vs. New OEM stator (right): The most important thing that you can't see would be the wire wrapping around the magnet. The magnet on the OEM stator is more powerful than the aftermarket stator. Why is this important? Because it's this produced signal that's used by the ECM for crankshaft position and where the ECM computes the desired spark advance based on engine demand and calibration.
It may be hard to see in this picture (aftermarket on the left and OEM on the right). The internal diameter on the OEM pins is smaller which will make a better connection. The larger diameter on the aftermarket pin will have more resistance (looser fit) and could be another reason for their failure.
Pictured below is the ground for the OEM harness which is made of better materials (tin-coated copper for the OEM and brass for the aftermarket).
The OEM harness has a heat barrier/sleeve for their wires, not sure what's on the aftermarket harness but it could be heat-shrink. Not sure if that's a problem but the OEM piece looks to be more robust.
Why is this important? Because it's becoming increasingly difficult to find a quality stator for those of us that use a distributor. The lack of a quality stator could affect the drivability, reliability, and performance on your Mustang. Stators for the 1987 to 1995 Mustangs are no longer produced. Which increases your chances of purchasing a knock-off (counterfeit) stator. Can't speak for 1987 to 1993 packaging but original 1994-95 Ford Motorcraft stators come in a bag with semi-cut holes at the bottom of the package on both the left and right side (front and back).
I hope this helps
Michael Plummer