Nissan Repair: hard starting and humming noise in nissan avenir, blitz turbo timer, nissan avenir

Question
Hi Calvin. I have a concern as it relates to my Nissan Avenir. It has a SR20 Det WITH A Blow off valve. It is a gt4 model. Everytime I turn the ignition on, there is a humming noise, the air bag lights cut off and i get a lazy start where the icons blink dimly. This happens only when the car is parked overnight. Throughout the day, once it is started there is no problem. Just before this problem, i observed the lazy start but there was no humming noise. The noise stops once the car has started. I have a blitz turbo timer installed, a cobalt rpm gauge and a hks air flow timer as well. Any help would be gretly appreciated. Thank you and God bless you.  

Answer
Hi Avalon -

Have you checked your battery?

You can check it really quickly by turning on the headlights while someone tries to start the car. If the lights all of a sudden go dim, or shut off, you battery needs changing. Also, always check the alternator for charging when a new battery is installed.

Hope this helps -
aloha
calvin