AEM 03-4110 logging problem

[dave w]

I seldom compare what the WBO2 is showing vs. what TunerPro RT is showing. I spend 99.98% of my time working with Excel spreadsheet.

Sometimes I pour some gas into the throttle body to verify lean WBO2 readings are really lean. Pouring gas into the throttle body will temporarily make the engine run rich and the WBO2 will temporarily show rich AFR's.

I wonder if blowing compressed air into the throttle body (throttle blades closed) will cause a rich running engine to temporarily run lean. Seems logical, but I've never tried blowing compressed air into a rich running engine.

[dave w]

I wonder if blowing compressed air into the throttle body (throttle blades closed) will cause a rich running engine to temporarily run lean. Seems logical, but I've never tried blowing compressed air into a rich running engine.

I have chip burning capabilities. When a data log (spreadsheet) shows a rich running engine I adjust the injector flow parameter. Often an increase in the injector flow rate will "lean" a rich running engine. For example; when most of the AFR's are consistently in the 12's I will increase the TBI injector flow rate from 61 lbs hr to 65 lbs hr and see what the data log (spreadsheet) shows. Increasing the injector flow rate will "make the computer think" less fuel is needed from the injector.

[Sledhead2]

Well I found the problem, it was me sort of, when I set the back of the gauge to point at P0/P1. I really set it to P4.
Turns out I was seeing the pointer arrow backwards. Now that its set to P0 the AEM wide band and Tunerpro dash read the same.

Thanks for the help, now once my dirt road dries up I can get some data logs.

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