Ford 7.3 Diesel Cam Sensor Waveform GOOD

More
3 years 3 months ago - 3 years 3 months ago #45401 by AJeep18
Had a 7.3 come in with a crank no start. No RPM showing on the cluster or scanner. Backprobed signal wire with the scope and it had a nice looking waveform, but the voltage was way low, like less than 3v at the peak. Kinda confused me that it had such a good looking waveform with a bad sensor, but went ahead and put one in it. Below is a good waveform cranking and running if anyone is interested. Sorry didn't take a picture of the bad one.
Attachments:
Last edit: 3 years 3 months ago by AJeep18. Reason: added pic
The following user(s) said Thank You: hartcoauto

Please Log in or Create an account to join the conversation.

  • Noah
  • Noah's Avatar
  • Offline
  • Moderator
  • Moderator
  • Give code definitions with numbers!
More
3 years 2 months ago #45568 by Noah
Thank you for sharing.
A perfect example of why it's important to not only focus on the pattern on the screen but amplitude or voltage the sensor is producing.
It would be very easy to zoom right in on the bad one and fill up the screen, giving it the appearance of a good signal.

"Ground cannot be checked with a 10mm socket"
The following user(s) said Thank You: hartcoauto

Please Log in or Create an account to join the conversation.

Time to create page: 0.218 seconds