Hi I purchased a second hand Mazda 5 all was well but engine was shaking a little wen first started up

fast forward a week I put diesel in did a few journeys in it on way home it was sluggish arrived home and it stalled I started but it cut out again it’s been 5 days now still won’t start

No lights on dash fuel injector checked

what code the issue be

 

Try some Seafoam?

 

you obviously have an electrical problem. Check for lose ground wires by shaking all the wires and recharge the battery and see if u can get some lights on dash, then check for obdc codes.