You have recorded the volts while the battery is idle. Try again measuring before cranking and during cranking. That should help identify that the battery is failing under load. Then again it could be the starter!
Have a 97 TDI Disco,with outside temp below 5 degrees will not start have to jump off aux.Got home last nite and put meter on battery ,it read 13.1 volts.Disconnected terminals and checked 5 hrs latter reading 12.72,checked this morning it was 12.67 reconnected and took 2 trys before it started and did not sound if there was to many more trys left.Is battery stuffed or something else amiss throughts appreciated.
Bruce.
You have recorded the volts while the battery is idle. Try again measuring before cranking and during cranking. That should help identify that the battery is failing under load. Then again it could be the starter!
Michael T
2011 L322 Range Rover 4.4 TDV8 Vogue
Aussie '88 RR Tdi300 (+lpg), Auto (RIP ... now body removed after A pillar, chassis extension to 130 & fire tender tray.)
could it be that the low temp is waxing the diesel causing it hard to start in the cold weather?
Inspect the condition of the earth strap that goes between the starter motor and the chassis.
Its towards the back of the engine down low on the passengers side.
The metal strap can wear against the chassis and cause starting problems.
Maybe even undo the chassis end connection and sand (clean) the connection up a bit, and make sure the connection is tight.
What happens if you switch your starting and aux battery around? Does the problem dissappear? If so, it is probably the battery.
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