starting/electrical issues

[Jezza_hr]

Okay, I've had an opportunity to check this today.

When going out to look at the readings across everything the battery was reading as little as 11.3v, which is a little low. I decided to test the voltage at the junction box and at the starter. The readings were a little odd, since they were .1v higher than the battery itself I'm guessing this could be down to environmental conditions or just how good the connectivity was on the probes themselves.

I attempted to start the car and as I expected it was reluctant to get the starter motor running, so I had to swap for my fresh battery reading 12.6v from the garage. Whilst I had the old battery out, I decided to do some changes by creating a new ground from the block with a nice clean connection to bare metal on the chassis and I doubled up on my 4 gauge wire to reduce any resistance that may be found at the junction box. I also decided to re-solder some ignition wires in the off chance these could be causing an issue.

When I put in the battery it sprung to life quicker than it ever has done before, I'm thinking the change in ground and doubling up the wire may have helped with this. Reading the battery whilst the ignition was on, I could see it was getting a steady 14.4v, but would drop down to the region of 13.5v with all the lights on, stereo, blower etc. but when revving up to 1500 rpm, it all leveled out to 14.4v again.

I thought everything seemed fine, but to check any other irregularities, I wanted to check that nothing is draining the battery while the car isn't in use. I understand that 0.2 mah is the most you want to see being drained from your battery, however mine measured at 0.1 mah so, I don't think there's an issue here.

I'm hoping that my tinkering around has sorted my issues, I'll soon find out I guess if the problem occurs again. When I can next get behind the dash, I will be swapping the power lead for the tachometer though, as there still seems to be the odd bit of movement when using things such as the indicators, so I may route this to a constant 12v feed instead of an ignition feed.