Problem with my 95 Buick Park Avenue
Engine size = 3.8 V6
dash lights = Check Engine Off and On
No signal from VSS dont remember the number
Repair work done prior = The BCM was changed once and the Heater
Control was changed. Worked great for about three months after that.
Work done to repair this problem = New VSS, new pigtail to VSS, ran wires
to the computer from VSS, cause broken wires there are common I guess.
Numerous trip to shops. Many hours of my own time.
How found us = Looking in desperation hoping to get a answer
GM tech = JK
question = Ok here it goes, We have a 95 park ave. and at random usually
low speeds or from a stop. The speedo will drop to 0 When this happened
the car only has 2nd, 3rd Gear it acts like trans is unplugged. No od and
check engine light it give a code of no signal from speed sensor. Called a
tech line I was told to check that get a volt meter and put it on ac Volt, and I
should get about 1 volt per mph. That was wrong that is when I changed
everything same readings, at 35 mph it read 50 volts. To make It work
again sometime you can stop the car and turn it off and restart and quickly
get out of town and run the car to 3000+ rpm and it will shift , the check
engine light goes away and them all of a sudden its back to normal. Other
times I just have to drive it until it starts to work. Ive spent piles of cash
having every respectable shop and auto electrician give it a crack. The last
place I was at told me to try change the gauge cluster. Wow what a
disaster. Any help
p would be appreciated.
Engine size = 3.8 V6
dash lights = Check Engine Off and On
No signal from VSS dont remember the number
Repair work done prior = The BCM was changed once and the Heater
Control was changed. Worked great for about three months after that.
Work done to repair this problem = New VSS, new pigtail to VSS, ran wires
to the computer from VSS, cause broken wires there are common I guess.
Numerous trip to shops. Many hours of my own time.
How found us = Looking in desperation hoping to get a answer
GM tech = JK
question = Ok here it goes, We have a 95 park ave. and at random usually
low speeds or from a stop. The speedo will drop to 0 When this happened
the car only has 2nd, 3rd Gear it acts like trans is unplugged. No od and
check engine light it give a code of no signal from speed sensor. Called a
tech line I was told to check that get a volt meter and put it on ac Volt, and I
should get about 1 volt per mph. That was wrong that is when I changed
everything same readings, at 35 mph it read 50 volts. To make It work
again sometime you can stop the car and turn it off and restart and quickly
get out of town and run the car to 3000+ rpm and it will shift , the check
engine light goes away and them all of a sudden its back to normal. Other
times I just have to drive it until it starts to work. Ive spent piles of cash
having every respectable shop and auto electrician give it a crack. The last
place I was at told me to try change the gauge cluster. Wow what a
disaster. Any help
p would be appreciated.
With all the things you have done, and it being intermittent, i would suspect
either a problem with power to the PCM, ground of the PCM, or a faulty
PCM. Especially as how you turn the car off to get it to correct itself some
times. This is a straight forward circuit- VSS, 2 wires straight to the PCM.
The not shifting is a result of no VSS- it is a default. Does not sound like the
cluster, since the PCM tells the cluster what to do. Loss of voltage to the
trans. solenoids would cause many different trans. codes, not normally a
VSS code, since that sensor is not powered up like the shift solenoids, etc.
Try tapping on the PCM to see if you can cause the speedo to act up.
