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I forgot to mention that I am in Reno. We are at 4500 ft. My MAP sensor is the LS1 1bar 16212460. I figured that may be why the reading is 84kPA with Key on , engine off

Thanks Guys! The Car is alot more fun to drive now. Like you mentioned, O2 sensor voltage seems to be going lean after 4400 RPM, even though the ECM is commanding more fuel. I strapped my Gopro to...

Posted a couple more. It does have better response now. Removed the cone air filter temporarily, didn't seem to make much difference. Added Cylinder Airmass

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Thank you sir. I am taking some logs with those changes. BR Jerry

Hi Folks. I just got my HP tuners MPVI2 last week, and am learning as I go. The Wideband is not hooked up yet; that is next week's project.
Car is a 1986 Monte Carlo SS with 3.73 gears. Tranny is a...