In these shut down days, I still like to give the old diesels a run.....I dont go anywhere of interest, don’t stop so therefore pose no risk to anyone.
So, I thought I'd stick a multimeter on the battery as I gave the car a run ( 2.0 tdi Yeti, 150 bhp, 65 plate) to see what’s going on.
Obviously I can’t check the current output but the results were a bit surprising. The car has a AGM battery and a stop/ start facility.
If the battery voltage drops below 11v it won’t even engage the starter motor or even the solenoid...it just doesn’t want to know. Absolute silence.
Anyway.....on start up, the voltage was 18.2v.
This remained the same for 12 minutes or thereabouts. It then dropped to exactly 14v.
Stopping the engine and restarting, the voltage was the same.....14v. However.....
When I switched on the stop/ start and tried again, the voltage shot back up to 18v for 2 mins.
Then, when I accellerated the car up to 4000 rpm fairly quickly, the voltage dropped to 10v
And that I didn’t expect.
I think its about time I packed it in......obviously a voltage regulator is no longer enough - the power requirements must be determined by the ECU.
John
So, I thought I'd stick a multimeter on the battery as I gave the car a run ( 2.0 tdi Yeti, 150 bhp, 65 plate) to see what’s going on.
Obviously I can’t check the current output but the results were a bit surprising. The car has a AGM battery and a stop/ start facility.
If the battery voltage drops below 11v it won’t even engage the starter motor or even the solenoid...it just doesn’t want to know. Absolute silence.
Anyway.....on start up, the voltage was 18.2v.
This remained the same for 12 minutes or thereabouts. It then dropped to exactly 14v.
Stopping the engine and restarting, the voltage was the same.....14v. However.....
When I switched on the stop/ start and tried again, the voltage shot back up to 18v for 2 mins.
Then, when I accellerated the car up to 4000 rpm fairly quickly, the voltage dropped to 10v
And that I didn’t expect.
I think its about time I packed it in......obviously a voltage regulator is no longer enough - the power requirements must be determined by the ECU.
John