Just a quck thanks and short reply as it is bed time here.Obviously you have diagnostic equipment.
Charge voltage through diagnostic equipment is a little low but OK.
Have you looked at live data and selected engine rpm whilst cranking? That checks the crank sensor.
How old are spark plugs?
Look at live data- things like spark advance to check that the system is trying to start it. Ditto check "starting authorisation" in live data for the same reason.
It could be you have an ignition switch issue but be guided by the results to these questions.
Sometimes the spark testers which fit on end of spark plugs are a great way to see if the coils are firing. It can save much checking of other stuff.
Yes I have a few tools but soon run into the knowledge wall 😬
Thanks for the crank sensor check method.
Plugs have probably only done 1/2 of their 100k life (not much driving since COVID)
Do you mean check spark advance during cranking? What should I see?
Not sure what starting authorisation is, I will check this out. What inputs are there for the authorisation - crank signal will be one I am guessing?
I have a COP test probe to see what is happening during cold start. Might be able to quickly check all coil packs if I am quick. If I was to use an old school spark plug tester how are the fuel injectors disabled?
Why would the car start first go during the rest of the day?
I should check to see if morning starting, stopping, and restarting shows different behaviour.
Testing could be tricky, and maybe take a couple of days as the cars will start on second or third go. Will have to use the logging function I guess.