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#1 |
![]() Join Date: Jun 2022
Location: Virginia
Posts: 82
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I have a wideband gauge that recently started show me running incredibly lean on medium to hard acceleration (20+ AFR).
Nothing feels off though. If it weren't for that gauge I would have no idea. No codes pop up, no stumble, no roughness. I borrowed Jagpanzer's tech1 and have been looking at the mV readings from the O2 sensors. At WOT both R and L sensors jump to 800+ mV. My understanding of these sensors is that you can't use the mV reading to determine a specific AFR, but in general being 500+ mV at WOT should indicate I am at least not running lean. That makes me think the sensor for my AFR gauge is bad, or the gauge itself. Do I have anything wrong here? How closely should the R and L sensor mV read to each other? They seem to wander a fair bit from each other at idle and easy cruising, but at WOT they both spike and are within ~50mV to each other. At idle the L sensor seems much less stable than the R sensor. |
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#2 |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 165
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Does your wide band sensor have a fresh air calibration routine you can run on it?
__________________
1987: Z51 Coupe, Z51, 4+3, Yellow / Graphite 1994: ZR-1 #150, Admiral Blue / Black 2015: Z06 Coupe, Z07, M7, Arctic White / Red |
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#3 |
![]() Join Date: Jun 2022
Location: Virginia
Posts: 82
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That is a good question. I'll need to dig out the manual for it.
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#4 |
![]() Join Date: Jun 2022
Location: Virginia
Posts: 82
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There is, but I need to access a controller box that was buried away during installation. I'll have to dig that out to initiate the recalibration, and relocate the box for future ease of access.
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#5 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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Not unusual to have a rich/lean disparity between banks in idle state w drivers side being lean.
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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