Chris's new build of an MX5 based car

[CTWV50]

Originally Posted by Ianr

Any idea what your voltages are Chris, I know this may sound daft but it seems to me you have a voltage drop, perhaps a faulty earth somewhere????
Ian

yeah I think there is a drop in voltage might try a few tests tomorrow. But with the time delay of around 10-15mins I think the lower voltage is highlighting a weak coil pack when it gets warm. But could be a faulty alternator or regulator. hmmm