Problem Logging Wideband Thru A/C Sensor

I have been able to log my LM-1 wideband through using the A/C pressure sensor and DataMaster. The problem I am having is the noise that shows up logging this way. The LM-1 shows a flat line reading (Say 14.5) and Datamaster shows the reading jumping back and forth like 13.8-15.2. So the signal output can only be averaged becuase of this noise. I have recalibrated the LM-1 to read from 0-5 volts from 10.0-AFR to 15.0-AFR to try and narrow the noise, but it didn't help that much. I have also tested this with the car shut off and I get the same noise!

Has anyone else seen this problem? Is there another sensor that I can use to log? Or could this be an issue with running the LM-1 using the Cigartte lighter? Anyone have any suggestions?

Thanks

Sorry, cant help your question, but how did you get the a/f to show in the a/c pressure reading in datamaster. Ive been searchin, but cant find a write up on how to do it.

Did you find a write up someplace?

Probably only experience this problem with the LM1 becasue of like you said Noise, this wideband seems to have a lot of, I would try a different type such as AEM etc.. LM1 is great, but has these weird spikes even when looking at it's own logs

Sorry, cant help your question, but how did you get the a/f to show in the a/c pressure reading in datamaster. Ive been searchin, but cant find a write up on how to do it.

Did you find a write up someplace?

I do have a writeup. PM me an e-mail address and I will shoot it to you. Hopefully you have more luck than I.