5 psi 13.7-14.3:1 AFR????

[zombezoo]

Does anyone have a guide for factory AFR ranges from vacuum~13 psi?
I’m tracking down a wiring problem on my van and have a wideband O2 hooked up but don’t have any experience on what is normal. ARF settles in at about 11.4:1 at about 10 psi. AFR seems slow to react around 0 psi. Sometimes it’s about 12:1, others its closer to 14:1 and hangs there. At about 7 psi it drops to 12.1~11.4:1

[detobias]

I have noticed that my AFR doesnt start to drop below stoich until about 5-6 psi

[zombezoo]

Ok, it doesnt seem to run bad at this AFR, but it seems really lean for any amount of boost.

[GLHNSLHT2]

that's how the stock computers do it. If they're not worried about it I wouldn't either. But having it richen up earlier does make the power come on butter smooth.

[zombezoo]

Good to know, getting ready to play with D-Cal. Need to get the gremlens worked out first.