CB99SS

I recently purchased a digital display Air/Fuel Gauge from Speed Shop. I tapped into the 02 wire from the driversside.

The guage at WOT shows .845 but autotap showed .917.

Why is there a difference?

Thanks

NoGo

iTrader: (2)

Difference in ground potential would be my guess.

All PCM signals are usually routed back to a PCM ground.

If the gauge uses its own ground, then they may give different potential readings when measuring off of the same 'hot' wire.

98TAauto

iTrader: (2)

neither atap or that guage is gonna be dead on.... to find out which is telling the truth get on a wideband dyno and see how she looks <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> then you will know which one to look at closer

CB99SS

I wish there was a Dyno close to me so I could use the wide-band. The closet dyno would be Dallas a 6 hr drive.

Thanks for the help.