The tachometer sensor may fail on Ford F-250

The tachometer sensor may fail; if the tachometer needle jumps around and the transmission has harsh shifts or does not upshift, this sensor should be checked. This sensor is mounted in a cover at the front of the motor.

RepairPal Verified
Average mileage: 147,500 (108,500–188,500)
Drive Trains affected: 2WD, 4WD, 7.3L V8 Diesel, Diesel
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
13 people reported this problem
6 people shared problem details
1993 Ford F-250- 4WD124,000
When at idle tach drops to zero then when accelerator is pressed it jumps to appropiate engine speed
1993 Ford F-250- 4WD149,000
This I think is also causing the engine to hover when at a constant speed.
1995 Ford F-250- 2WD108,500
Tach stopped working - Transmission won't shift out of 1st gear
1995 Ford F-250- 4WD180,000
transmission won't shift out of low. speedo needle jumping, or not moving
1993 Ford F-250- 2WD188,500
just started had to order part
needle jumps below 1400 rpm and shifts incorrectly above this its ok. im going to try the sensor.
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it will go forward but won't back up?????

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