When I come out on a morning and start the car from cold the rev counter doesn't work, the lights are dim and the heater fan is a lot slower than it should be. If I rev the car to 3k rpm once, everything works as it should. Anyone know whats up? If I just start the car and don't rev it and leave it to idle for 20 mins then turn it off it won't start due to the battery being flat!!! but if I start it, then rev it to 3k everything's ok?