nimbin

Gday , ive been enjoying a 9002 2.3 for a year and a half trouble free
i drove the fuel low a few times and pretty sure i wore out the clearances in the pump, so replaced the motor only,it ran for 3 days and just didnt restart again.Could the crank pos. sensor just fail? or perhaps the coil .
i bought a code reader to analyse the electronics but its reading link error so i cant tell whats going on.
any sugestions besides call a mechanic or tow it.
thanks