Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
You have done a lot of work so far.
Have you checked the cooling system is full, bled correctly?
Does it blow black smoke on startup, when you say overfueling?
Did the spark plugs reveal anything?
I would say no doubt the engine has overheated without a low speed fan relay fitted.
Do you need any further help?
I hope my advice has been of assistance to you.
Happy new year.
Have you got a 4 or 5 pin relay in there?
5 pin is correct.