soundes like your started may be going out or you have a fuel vapor lock problem.
You wouldn't happen to be using too heavy of an engine oil ? What grade of engine oil are you using ?
dying battery, bad ground, starter brushes. take your pick
the answer is friction
If it turns over very slowly, check for bad battery and ground connections. It should turn over quickly if you jump start it. If it doesn't, the battery connections are bad and/ or the battery is bad.
You need more info posted for this. Does it turn over at all? Is the battery old and it turns over slow? Are you getting a gas smell while trying to start. Have to tried to remove a plug wire to see if there is spark only if you engine is turning over at all. So many answers to give, just not enough info given for me to try and answer.
Does it say Engine Prot? means that you might be low on fluids such as coolant and the longer you run with it it, it will start to slow down the engine until u stall out....happen to my cat c7 in my freightliner. and it turns out i blew my cooling system.
Weak battery, starter going bad, or engine out of time.
that isn't a question, but if it did it it would get pulled to earth by earth's gravity
Weak battery.
limited info, but id say its a crank sensor. turns over slow and choppy this could be your problem. turns over normal could be lack of spark or fuel. by turning over, i mean motor cranking but not starting. without more info its anyones guess.
That's normal, It's a 6 volt... If it's tuned good it will fire up, I'm amazed mine starts cranking so slow If it is too slow in time it will turn over slowly. Have the timing checked.
Eventually slow running turns into walking. All animals can do that.