In the first cold snap about a month ago the car failed to start for the first time ever. I suspected frozen water in the fuel filter so removed it and replaced with new. Checked contents of old filter- clean as clean can be. Primed fuel sytem using plunger and it started after a little cranking. Next morning after another cold night car failed to start. Prime system again using plunger and it started. Ambient temps went above freezing for 2 or 3 weeks and the car has been starting/running perfectly. Last couple of days, sub-zero, and it is refusing to start again. Car is late 2003 owned from new. About 80K miles. Serviced to manufacturers schedule with oil/filter changes in between.
I suspect this is a problem connected with zero or sub-zero temps. I also suspect the non-starting is an electronic rather than mechanical problem.
Any ideas please on how to fix or diagnose the problem.
Many thanks