Program multiple rpms over 8hr run time

https://genuineapplianceparts.com.au/fridge-parts/hoover-fridge-parts

code is for multiple misfire, have you got the plugs connected in correct firing order ? if have try getting someone to start engine somewhere dark and watch for any Arcing from plug leads , if nothing seen recheck the timing , fuel delivery etc

When multiple systems fail at the same time... ALWAYS check the DC negative for corrosion, it is as important as DC positive.

sounds like you have multiple start times. unplug, remove battery after 5 minutes plug transformer back in and install battery. If unit is ne return it

Thank you for choosing FixYa!

Regarding this concern of yours with your battery, I would like you to understand that the 8hr time frame is basically the stand-by time for your computer turned ON but doing nothing. Now, if you base the battery's performance while you're using the machine, it can only run at most 4-6 hours depending on the application you are using, the resources that the application utilizes, and the running application required by the computer to run. It means that you really won't be able to max out your battery's 8hr capacity if you're using the computer on a regular basis.

The best practice though, is that you keep the battery reach at least 1% of power before charging the laptop to maintain and lengthen the battery's life.

Have a good one still. Take care!

a bad distributor indicates in several ways
misfiring on one particular cylinder --- cracked cap, carbon track diverting the current for the spark
multiple misfires -- corrosion in the HT leads receptacles
intermittent spark ---rotor button spring contact not touch carbon button in cap--replace cap
varying timing --- using a timing light , the timing varies between BTDC and AFTDC--- worn bushes in the body, worn shaft, bent shaft, excessive end float in the shaft
faulty advance plate connections---stuck or loose
if electronic --- exciter touching the pickup sensor( worn shaft/ bushes
without a make ,model year and control method (efi or electronic distributor) it is difficult to determine the cause of rough idling and the rpms variation
that can be from vacuum leaks, low fuel pressure , mixture adjustment if carby or mixture control if ECM
if EFI unit run the fault codes for pointers to the problem area

It sounds like maybe your I.A.C. (Idle Air Controll) valve is stuck or gummed up. Try cleaning it and check for vaccume leaks.

You can discharge the battery to 10% and then full charge it, take this circle for several times. If it can not help, maybe it is the problem of your new battery.

Further more, you can check if some app is running

remove the plugs and inspect them for white deposit, means a bad head gasket, but run a compression check to be sure, if good then go it ignition and injection

have you tried removing the battery for 10 minutes? this will reset the program, turning it off and on will not reset program, you need to do a cold reboot to accomplish that, remove the battery and try that.