vss question

[bravedude]

will a vss make my car get reall bad gas mileage? i am almost possitive that that is my problem, but damn i;m getting 30 miles less per full tank. any input would be helpful.

[Leung]

Have you checked your tire pressure?

do you have anything extra in your car that you typically wouldn't?(more unnecessary weight)

had a tune up lately?

are you driving any differently like are you romping your foot down on the gas pedal instead of lightly tapping it like a grandmother.

Things like that may affect your fuel consumption... then again it is still considered winter so you might be pumping at a station using a winter blend of gas.

[Jarrett]

A vehicle speed sensor is not going to adversely affect your ability to get the same mileage you were once getting out of a tank of gas. Depending on how exactly it's malfunctioning though it could affect your car's ability to perceive the mileage traveled if it's operating intermittently. You haven't really elaborated as to how you've narrowed it to the VSS though.

[AAPOQ]

A vehicle speed sensor is not going to adversely affect your ability to get the same mileage you were once getting out of a tank of gas. Depending on how exactly it's malfunctioning though it could affect your car's ability to perceive the mileage traveled if it's operating intermittently. You haven't really elaborated as to how you've narrowed it to the VSS though.

In one way it could effect it, my VSS went out and I lost overdrive. No overdrive equals horrible gas mileage.

[Jarrett]

In one way it could effect it, my VSS went out and I lost overdrive. No overdrive equals horrible gas mileage.

True story. I sometimes forget how weird automatics can be given that they rely on input from many sources including a TCU.

OP, there's an example of how you need to be more clear with your issue. Not only do we not know how to help you with the limited details that you've provided but this thread is hardly valuable to someone who would search for VSS issues in the future.

[bravedude]

i might try major tune up see if it works. thanks. weirdest thing, the speedometer needle would jump up and down few times, and finally just drop to 0. and would be fine if i re started the car. these damn cars one sensor goes out and it could be 3 other thing before you find out what it really is. thanks for the input guys

[accordztech]

replace the sensor then. They are a dime a dozen at the junkyard.

[Fleetw00d]

The VSS supplies a signal to the speedometer, odometer, and cruise control. To verify the VSS is the problem, note if the odometer stops counting when the speedo drops to zero; also try to engage the cruise. If the odometer and cruise work, it is not the VSS, just a problem with the speedometer. If all three don't work, then the VSS is the likely culprit.

[bravedude]

thanks a lot guys

[accordztech]

The VSS supplies a signal to the speedometer, odometer, and cruise control. To verify the VSS is the problem, note if the odometer stops counting when the speedo drops to zero; also try to engage the cruise. If the odometer and cruise work, it is not the VSS, just a problem with the speedometer. If all three don't work, then the VSS is the likely culprit.

In all my life, I never thought of diagnosing the sensor that way. I guess you learn something new every day