powerlogger and lm1 displaying different readings

[KevinB]

I just installed a powerlogger in a car I'm working on. I also installed a lm1 WB also. The lm1 is showing about a .5 higher a/f then the pl. I tried analog output 1 and 2 from the lm1 and had the same results. I haven't really messed around with it yet but maybe someone here knows why this is happening and can save me sometime. Thanks!

 

[TurboBuRick]

Where are you grounding the lm-1? Try grounding to ecm case.

 

[norbs]

Try grounding the lm-1 at the engine block, see if that helps.