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EF V8 Low Charging Voltage 

 

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 Post subject: EF V8 Low Charging Voltage
Posted: Sun Jan 18, 2015 9:35 am 
Getting Side Ways
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Location: Hamilton
New Zealand

Any nown issues with EF V8 alternators with low charging voltage? I have an EF V8 Fairmont and charge voltage is is about 13.5V. Swapped alternators to a spare I had, but same low charging voltage. I'm used to seeing arounf 14.5V on charging. Battery is OK. But the car struggles to start after driving around town (thermofans running etc). A jump start turns the motor over normally, so it's not the starter motor

 

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 Post subject: Re: EF V8 Low Charging Voltage
Posted: Sun Jan 18, 2015 1:17 pm 
Technical Contributor
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Age: 53

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Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

Check the negative terminal earths to the body, and engine block. Get a multimeter and see what (if any) voltage drops you get across them with engine running.
Wouldn't hurt to unbolt them and give them a clean, along with the battery terminals too.

I'd be expecting around 14.0v idle voltage.

Oh, and check the alternator plug for crap/corrosion, etc.

 

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96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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 Post subject: Re: EF V8 Low Charging Voltage
Posted: Tue Jan 20, 2015 7:38 pm 
Technical Contributor
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as per snap0964 -
do thermo fans run all the time or not ??
have battery tested
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