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Originally Posted by Oelmensch
I've noticed a slight pickup with minor increases in pedal that I assume is the engine coming out of lean burn while still being well below the vtec threshold
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Sounds about right.
In the Insight, forcing it out of lean burn with a minor pedal movement (or when it does an automatic NOX purge) does feel like the turbo kicked in (no VTEC or assist, either). OK, that would be a very, very tiny turbo... compared to how utterly gutless and mushy the pedal normally feels when in L.B.
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I can't really feel a significant change going into lean burn, but I suspect the MPGuino addition will make that abundantly clear with the shift in mpg.
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Absolutely. Instant MPG jumps significantly higher.
I think there's also a way to monitor L.B. with a digital multimeter on the oxygen sensor, if you're interested. Not familiar with the details - a well crafted search query might shed more light on that. Tom O, one of our (formerly more active) moderators was also working on a "lean burn indicator" for his VX (dashboard LED), but I don't remember the outcome of that one either.