when the car is running i get 13.5 volts off the alternatormy problem is i got a leak some were cause it was charged last night and it went flat over night when nothing was left on

13.5V is too low, it should be more like 14.3V...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Is it 13.5 at idle or when you rev it?

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http://www.youtube.com/user/Hanras

13.5 volts is pretty normal at idle, yes it is a bit low, but still normal. I'm not sure i've ever seen a car idle at 14.3volts

A Lucas 16ACR is rated to give 34A at 14.0-14.4V
Lucas 15AC is rated to give 28A at 14.3-14.7V.

This is not at idle, rev it to 2000-3000rpm.

My AU Falcon gives out 14.5V at 650 rpm idle.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

yes at idel 13.5 valts at idle and i have searched for power drainige and i can not find a single stupid one my wireing harness is like made out of 300 different bits of wire so i am gunna buy a new harness and rewire the whole car 2 morrow how long do u recon to rewire a car

Rewiring the car is not going to fix the problem. Wiring harnesses do not cause slow leaks, they will short out or they will open circuit, but they will not cause a battery to drain slowly.

Car alarms can cause batteries to drain, as can car stereos over time, also immobilsers, interior lights, electric fuel pumps wired incorrectly and similar.

There will be a cause, but spending 450 dollars and a day or two of rewiring the car is throwing the baby out with the bath water to make use of an old term. You would be better off taking it to the auto spark to suss out. He will put a current monitor on the battery and disconnect wires off your fuse panel until the current drain stops (if one exists). Once he finds the offending circuit he can then chase it out by hand to find the source. You could do this as well by using a multimeter which can measure current and connecting it in series with the large brown wire which runs from your solenoid to the fuse box.


It may also be the condition of your starter motor which is causing the problem. You should have it checked out properly.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

hmmm i got a multimeter but not a fuse box just got fuses wired in the wire i will replace starter motor 2 morrow with a different one and i will drive it out to warick aguston and get him to have a look at it cause this is really really anoying me