Speedo is freaking out

[sab]

Viewing vehicle speed in the OBD2 live data stream with a code reader will tell you if the spikes are coming from the PCM, which will help determine the cause.

Edited to add: I said it again because it’s still relevant.

 

[EROCK]

Viewing vehicle speed in the OBD2 live data stream with a code reader will tell you if the spikes are coming from the PCM, which will help determine the cause.

Edited to add: I said it again because it’s still relevant.

Ya I don't have the reader you're talking about. I looked up what I think you're talking about on Amazon for like 70 bucks. You think that will tell me the info you talking about?

 

[macleanflood]

What's the speed showing through the ODB port? Got a code reader that can do live data? A Bluetooth ODB dongle and Torque Lite (free app) would do it.

-Mac

 

[sab]

Ya I don't have the reader you're talking about. I looked up what I think you're talking about on Amazon for like 70 bucks. You think that will tell me the info you talking about?

View attachment 530210

The picture on their website shows vehicle speed graphed in real time, which is exactly what you need:

Yes, I think it will work.