Grant Baker Posted May 1, 2018 Report Share Posted May 1, 2018 Hi. Just a daft question. On a 36-1 wheel, you can set injection and ignition to sequential, even without a cam sensor. Is this correct? Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted May 1, 2018 Report Share Posted May 1, 2018 No it still needs a cam sync for this as you get a missing tooth every 360 degrees in the 720 cycle. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted May 1, 2018 Author Report Share Posted May 1, 2018 Exactly. So why does it allow it to be selected? Runs fine but obviously it’s batch firing. Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted May 1, 2018 Report Share Posted May 1, 2018 The fuel and ignition does not have any checks in it for types of triggers selected - very common. Also very common for the ECU to default into batched/banked mode in the event of Can sync failure, it’s a good strategy as it allows the e give to run on the first turn instead of waiting for 2 revolutions before starting. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 1, 2018 Report Share Posted May 1, 2018 Actually in multi-tooth/missing mode it will run in full sequential without a cam sensor, it just will not start up without the sync signal present. It doesnt default to batch fire/wasted spark if cam sync is lost - it only needs the cam signal for startup, once its running (provided the crank signal remains good) the ECU can keep count of phase/position after that. At present our generic multitooth/missing mode doesnt do the wasted spark start-up strategy - so it does potentially need to see two full revolutions before it starts firing anything. Most of our OEM trigger modes will sync in less than one revolution BTW. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted May 1, 2018 Author Report Share Posted May 1, 2018 What if there is no cam sensor sync selected? Quote Link to comment Share on other sites More sharing options...
Simon Posted May 2, 2018 Report Share Posted May 2, 2018 With the CAM sync set to none you will get a 50/50 hit rate if it happens to be on the correct stroke it will run. Quote Link to comment Share on other sites More sharing options...
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