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by Gordonjcp 1117 days ago
Not really. What's it going to do, make the engine run rich for a fraction of a second until the next time it recalculates the mapping?
2 comments
samtho 1117 days ago
Yeah, the kinetic energy associated with a running engine (flywheel to entire vehicle mass) makes it rather difficult to stall from a single cycle problem, especially given that it consistently recalculates and checks everything multiple times before the timing signal is sent.

The engine feels like it’s running fast, but it’s really slow compared to ECU’s ability to observe it and respond to it. A single missed signal would just result in a misfire.

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Gordonjcp 1117 days ago
> kinetic energy associated with a running engine (flywheel to entire vehicle mass)

Like the notoriously hard to stall Citroën 2CVs and Dyanes, where roughly a third of the total weight of the engine was the ridiculous flywheel.

They could chirp the tyres in first, second, or third gear if you got all that mass spinning fast enough, not from power but from momentum.

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ilyt 1117 days ago
Mapping is not recalculated in flight, it is loaded from flash (or via obd when tuning) and normally not reloaded till restart. You might have some luck with short/long term trim fixing it, or not.

If you're lucky ecu might crash or run rich in that one rpm/load point, if not it might run lean entire highway drive, if say a bitflip happens to flip lambda probe settings to always show mixture being too rich.

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