Smart ECU: misfire detection on running engine

[rusefi]

Can we please detect broken injector or broken coil programmatically?

[chuckwagoncomputing]

#925 #343 #2180

[rusefillc]

See https://rusefi.com/forum/viewtopic.php?f=5&t=2071

[chuckwagoncomputing]

FWIW, Ford's IDS software has an awesome cylinder contribution graph that has also been copied by other scan tool software. It's great that the ECU can say "cylinder n is misfiring", but being able to visualize the data is awesome.

[rusefillc]

@chuckwagoncomputing any screenshots? :)

[chuckwagoncomputing]

Even better, a video:
https://www.youtube.com/watch?v=G6WYnNlYuiQ
The video is a diesel, but the same thing exists for gas vehicles.

[stefanst]

Trying to start doing this with a low-resolution Miata crank trigger may be a tall initial hurdle to jump. Wouldn't this be easier using a 60-2 or 36-2 or similar trigger?

[thirstyone]

even with this config you can clearly see the difference in timing (I just looked through the second file in saleae - without injector, I believe, without a spark it would be even more obvious)

[rusefillc]

@thirstyone any specific numbers / any excel or google spread sheet to attach? :)

[chuckwagoncomputing]

Doesn't the trigger decoder already calculate where it "expects" the tooth to be, versus where it is? A visualization of this data would be better than nothing. Perhaps as an overlay of the trigger diagram in Console?

[rusefillc]

@chuckwagoncomputing we have a proposal #2222 but only a proposal.

Our reference diagram at https://github.com/rusefi/rusefi/wiki/All-Supported-Triggers#mazda-miata-nb

[rusefillc]

We have data and proposal at https://rusefi.com/forum/viewtopic.php?p=42922#p42922