Strange object behind balancer 5.0 efi
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5th Wheeling
Joined: Jan 2013
Posts: 38
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From: Georgia
Strange object behind balancer 5.0 efi
Hi folks,
im about to remove the harmonic balancer on my 96 f150 5.0 and I’ve run into a four-pointedxtarlike object about 5 inches or so in diameter that turns with the balancer. I have no idea what is, nor does any repair manual I’ve looked at. I’ve never seen anything like it in 60 years of wrenching. Does anyone know what it is? Thanks
im about to remove the harmonic balancer on my 96 f150 5.0 and I’ve run into a four-pointedxtarlike object about 5 inches or so in diameter that turns with the balancer. I have no idea what is, nor does any repair manual I’ve looked at. I’ve never seen anything like it in 60 years of wrenching. Does anyone know what it is? Thanks
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
That is a '96 which should be OBD2 and would have a crank sensor, there should be a sensor mounted on the timing cover somewhere close by, the part on the balancer is a tone ring that triggers the sensor and sends a pulse to the computer. This sensor isn't used for ignition I believe it is a misfire sensor.
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5th Wheeling
Joined: Jan 2013
Posts: 38
Likes: 0
From: Georgia
Don
That is a '96 which should be OBD2 and would have a crank sensor, there should be a sensor mounted on the timing cover somewhere close by, the part on the balancer is a tone ring that triggers the sensor and sends a pulse to the computer. This sensor isn't used for ignition I believe it is a misfire sensor.
Fleet Owner
Joined: Oct 2005
Posts: 20,787
Likes: 1,751
From: Kentucky
A photo and description of the misfire sensor and tone ring from another forum:
...
Misfire Sensor in a 96, aka Crankshaft Position Sensor (CPS), next to the pointer.
by unkown FSB member.
...
Excerpts:
"The misfire sensor is an electromagnetic inductance coil similar in operation to a camshaft or crankshaft position sensor. A four-point stator, or pulse ring, located behind the crankshaft damper generates an electrical impulse in the sensor at each 90 degrees of rotation. The powertrain control module (PCM) monitors the sensor pulses and flags any misfire events.
When a specified number of misfires occur within a certain time frame (miesk5 note two trips), the powertrain control module will alert the driver to the condition by turning on the CEL.
courtesy of miesk5
Clipped from this thread: https://www.fullsizebronco.com/threa...o-ping.474634/
...
Misfire Sensor in a 96, aka Crankshaft Position Sensor (CPS), next to the pointer.
by unkown FSB member.
...
Excerpts:
"The misfire sensor is an electromagnetic inductance coil similar in operation to a camshaft or crankshaft position sensor. A four-point stator, or pulse ring, located behind the crankshaft damper generates an electrical impulse in the sensor at each 90 degrees of rotation. The powertrain control module (PCM) monitors the sensor pulses and flags any misfire events.
When a specified number of misfires occur within a certain time frame (miesk5 note two trips), the powertrain control module will alert the driver to the condition by turning on the CEL.
courtesy of miesk5
Clipped from this thread: https://www.fullsizebronco.com/threa...o-ping.474634/
Fleet Owner
Joined: Oct 2005
Posts: 20,787
Likes: 1,751
From: Kentucky
Yes that is the tone ring/stator for the mis-fire detector as described in the link I posted earlier.
A four-point stator, or pulse ring, located behind the crankshaft damper generates an electrical impulse in the sensor at each 90 degrees of rotation.
A four-point stator, or pulse ring, located behind the crankshaft damper generates an electrical impulse in the sensor at each 90 degrees of rotation.
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