Voltage opinions?
29-01-2011, 02:31 PM
#1
Voltage opinions?
Hi,
I currently get 13.24V at idle with NO load, I get 13.30V at the alternator itself, however when I turn on blower, heated rear screen and headlights I get 12.75V at battery and 13V at alternator, so my question is what is everyones output at idle?
With that little difference I don't suspect the battery to alt cable being the problem.
13.30V to me seems a little low considering thats with no load, the alternator was tested a couple of years ago and and they said it was fine, they did replace the voltage regulator for me though as the other one was a little loose, so my question is what is everyones output?
The voltage does not increase with revs either.
Any help would be appreciated.
Martin
I currently get 13.24V at idle with NO load, I get 13.30V at the alternator itself, however when I turn on blower, heated rear screen and headlights I get 12.75V at battery and 13V at alternator, so my question is what is everyones output at idle?
With that little difference I don't suspect the battery to alt cable being the problem.
13.30V to me seems a little low considering thats with no load, the alternator was tested a couple of years ago and and they said it was fine, they did replace the voltage regulator for me though as the other one was a little loose, so my question is what is everyones output?
The voltage does not increase with revs either.
Any help would be appreciated.
Martin
29-01-2011, 03:05 PM
#2
20K+ Super Poster.
Nothing wrong with those figures, the voltage won't always increase with speed, more so when the amps are being gobbled up, I always say so long as 12.8 maintained at 2000rpm with everything on then it's fine.
Mine was no load 13.3-13.4, and dropped to around 12.6@idle with loads, reaching 12.9@2000rpm.
tabetha
Mine was no load 13.3-13.4, and dropped to around 12.6@idle with loads, reaching 12.9@2000rpm.
tabetha
30-01-2011, 10:51 AM
#6
Never have to rev it, I should think thats a lazy diode thats the problem, does your idle ok when you startup? I used heated rear screen, heater on pos 2 and headlights to put under load if I turn heated screen off then it's around 13V so same as you.
Martin
Martin
30-01-2011, 06:11 PM
#7
no i have to rev it for a minute to keep it going, i had a fault with the tps settings thought id sussed it as i found ive got 4x4 ecu and 2wd wiring so swopped the wires round on tps and my coldstart and iscv started working again, then i came to it next morning and have no coldstart but appear to have idle correction once running for a few minutes! bloody cossys
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