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Barometer: How far "off" can it be/specs?

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brownfinger

10+ Year Contributor
1,957
11
Aug 26, 2008
Normal, Illinois
MMCd says the barometric pressure is .95 bar. The National weather service says it's 1.025 bar. I'm curious how far off that signal can be before it will affect the car. My fuel trims keep getting maxed out, starting with the low FT, and the O2 trim is still 110-120% with the lo FT at 139.8%
Bone stock 2.0NT, can't find any intake leaks. New plugs,wires, coil, TB & gasket, FPR, injector seals, CTS, cleaned and tested (and disabled) EGR, capped PCV intake ports, new PCV, new exhaust manifold w/no leaks. I have 2 different new-ish O2 sensors with identical results.
Any ideas?
 
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