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VSS question

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Old

Jun 26, 2013 | 08:24 PM

#1

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From: West Houston, Tx.

Car: 1991 Z28

Engine: 355 TPI

Transmission: 700r4

Axle/Gears: 9 bolt disc / 3:27

VSS question

I replaced the trans mounted sensor and data logged the ecm. For ome reason the ecm think the car is moving at about 135 miles an hour at a stand still. I thought the pulse from the sensor is what changed the speed. My question is with the ecm reading it at a constant unchanging speed does that mean the wiring is bad ,speedo or cruise control????

Old

Jun 26, 2013 | 10:37 PM

#2

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From: Chasing Electrons

Car: check

Engine: check

Transmission: check

Re: VSS question

A '91 f-body VSS is a 4K PPM magnetic sensor (sine wave). Sounds like something is not correct...

RBob.

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