The stuff we end up explaining on the phone twice a week, written down
so you can read it before you ring. If something here saves you a
call-out, good.
A remap changes how the engine actually behaves: where the power comes on, how it tows, and how much fuel it drinks doing it. For a diesel that spends its life towing up and down the range, a towing tune is a different thing to one chasing a peak power figure. Done properly it makes a vehicle nicer to drive and cheaper to run. Done badly it costs you an engine.
The wet season finds whatever was already tired on a vehicle. Brakes that were fine on dry roads, a cooling system that coped with winter, a battery that only just turned it over in July, and an earth that has been corroding quietly for a year. October is the cheap time to find them. Mechanical and electrical, checked in the one visit.
Cab air conditioning fails in the build-up, when every machine on the Tablelands is working and nobody has a spare day. A system that was weak at the end of last season has not fixed itself over winter, and a leak found in October is a repair. The same leak found in January is a lost week.
Nine times out of ten a car that will not start is the battery, the starter motor or the alternator, and from the driver seat all three feel about the same. The clues are in what happens when you turn the key: a rapid clicking usually means a flat battery, a single loud click with nothing else points at the starter, and a car that starts fine with a jump but is dead again the next morning is usually the alternator or a drain, not the battery.
Car air conditioning is a sealed system, but it is not a perfectly sealed one. Refrigerant seeps out slowly through rubber hoses and rubber seals, so every system loses a little over time. If yours has gone from cold to warm quickly, that is not normal seepage, that is a leak, and topping it up without finding the leak just puts the same gas back out onto the road.