Typical cranking voltage?
Hi,
I get around 12.8v with the ignition on and 9.8v when cranking the engine - is this normal? seems a little low to me. Thanks, Alex |
sounds about right, ignition on value could be as low as 12 though dependant on how long its stood and not driven
bob |
Voltage measurements can vary tremendously with battery charge state..
How charged is the battery? what is the electrolyte reading? Hat eto be a kill joy, but you have to know these items to diagnose any further. Simply going on a quick voltmeter reading across the battery terminals can lead to some wrong answers and subsequent not needed parts being fitted. |
Thanks Bob / Scoobyslut.
The battery is one of Halford's sealed 'calcium' batteries with an integral charge indicator (a float that appears in a window when the battery charge is 'ok'). Unfortunately not possible to test specific gravity as all cells are fully sealed. It's only a year old so I don't suspect a fault, but the engine feels slightly lazy on the starter. Possibly getting gradually discharged by lots of short trips, so I'll put in on a trickle charger over the weekend and see if that helps. Bob - can you advise on the procedure for setting voltage compensation? (currently 20). Do you just pick a value that minimises any idle differences between no electrical load / full electrical load? Thanks, Alex |
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