Hi guys,
So before I take my lovely car to the auto electricians, I'd like to try and figure it out as I know they can be quite pricey.
Here's the story...
With a brand new battery, the car will last a month if I drive it every 3~ days or so. After the 3-4 weeks, the battery will be flat. This means I have to jump start it after said time. (If I jump start the car and drive for 30mins, there is not enough charge for a 2nd or sometimes 3rd start)
Boot light does not stay on, the car used to have an alarm system which has since been removed by the previous owner (could be the issue). Radio is ancient and a bit f**ky (could also be the issue, clarion head unit).
With me trusty multimeter and voltmeter, the alternator is definitely charging the battery at a nice 13.99v whilst running, however when I flick the headlights on it drops voltage from 14~ to 10~ then back up again (makes the car stutter a tiny bit).
Here's the f**ky part.
When the jumper leaders are attached to the good car, my skyline runs beautifully. When I remove the cables, or start it with a good battery, the car splutters a little bit and runs like ass, just idles very rough and up and downy (when driving its fine). Thus I believe this to be a bad earth somewhere, thus probably a parasitic drain etc?
From my research and limited electrical knowledge it seems I am SOL and the auto elec is the only option... What do you guys think, is this common?