Intermittent Long Crank (randomly once/twice a day)

Could I ask what you mean by “centralised” no start please?
Sorry. I meant that the ECU commands always all injectors to fire as soon as all necessary conditions (cranking speed, timing, fuel pressure, etc) are fulfilled. Thus "centralised" = some of the conditions are not yet fulfilled causing ECU to hold back firing injectors - e.g. too slowly rising fuel pressure would hold injector firing until the pressure is high enough (for successful engine start).

So my thought is if engine starts up right on all cylinders it's not likely to be injector related. In other words - a leaking injector would cause engine to start (too early but) only on that cylinder, or failing injector would run poorly thus causing "rough" idling.

I hope this helps...
 
Sorry. I meant that the ECU commands always all injectors to fire as soon as all necessary conditions (cranking speed, timing, fuel pressure, etc) are fulfilled. Thus "centralised" = some of the conditions are not yet fulfilled causing ECU to hold back firing injectors - e.g. too slowly rising fuel pressure would hold injector firing until the pressure is high enough (for successful engine start).

So my thought is if engine starts up right on all cylinders it's not likely to be injector related. In other words - a leaking injector would cause engine to start (too early but) only on that cylinder, or failing injector would run poorly thus causing "rough" idling.

I hope this helps...
 
Sorry. I meant that the ECU commands always all injectors to fire as soon as all necessary conditions (cranking speed, timing, fuel pressure, etc) are fulfilled. Thus "centralised" = some of the conditions are not yet fulfilled causing ECU to hold back firing injectors - e.g. too slowly rising fuel pressure would hold injector firing until the pressure is high enough (for successful engine start).

So my thought is if engine starts up right on all cylinders it's not likely to be injector related. In other words - a leaking injector would cause engine to start (too early but) only on that cylinder, or failing injector would run poorly thus causing "rough" idling.

I hope this helps...
Hi mmi hope all is well. Here are 2 comparison videos as requested. I appreciate that the long crank isn't too long (it's longer sometimes), but hopefully this helps with the diagnostic. If it's early normal for this to happen, please excuse my ignorance, it just doesn't feel right when it happens if that makes sense.

Long crank: https://www.youtube.com/shorts/Oo3lgg5JrA4
Standard crank: https://www.youtube.com/shorts/MbXSfpajxMw

Thanks again
 
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