RE 2001 Ford Explorer NewIt has a new battery, coil, and wires in place. TruckThe truck will not start below -7 F despite strong cranking; in these temperatures, sound of fuel pump priming is muted or absent. Upon rewarming, carthe truck starts briskly and pump sounds return. No other classic signs of fuel pump failure. Any ideas that you may have would be hugely appreciated. Thankyou Thank you!