Jump to content

AFR reading variation


Jo LeForce
 Share

Recommended Posts

Using an Innovate LM-1 to read AFR I had selected the innovate LC-1 calibration & had programed the LM-1 both output signals to emulate the LC-1s (0V = 0.5 lambda & 5V = 1.523 lambda). Connected the reader to AN-Volt4 via a 3-wire AUX cable, the tip is signal & the bottom is grounded to sensor ground on the ECU. As I use different AUX cables, sometimes AFR readings are spot on, showing identical readings on both the LM-1 screen & PCLink, but often there is a difference in readings with PClink showing leaner AFR value than the reader by 1-1.5 AFR! What could be causing such variation in AFR readings?

Link to comment
Share on other sites

If you are saying you get a different reading when you use a different cable then the suggestion would be there is a bad connection/high resistance in one/some of those cables.

To troubleshoot I would set up the LM1 to output a flatline voltage, i.e. 0.5Lambda=2.5V, 1.5Lambda=2.5V, then it will output 2.5V all the time.  You can also set up the link analog input to display voltage.  If PCLink doesnot show 2.5V then you can get a multimeter and check there is 2.5V at every connection point.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...