What voltage do you see from your alternator

[M K]

Hi

Can you guys tell me what voltage you see on average when your cars running? Driving and idle

On the fiesta cozzy I only ever see 13.4v Max and I'm sure it should be around 14.4v

Think it may be time for a new 1


Thanks
Marc

[Dan Le Moignan]

Sure mine was 13.9 on idle via secs monitor


Sent from my iPhone using Tapatalk

[grcossie]

You can change to an 14,5v regulator, or even 15v, i have used bouth

[Cozzy]

Hi

Can you guys tell me what voltage you see on average when your cars running? Driving and idle

On the fiesta cozzy I only ever see 13.4v Max and I'm sure it should be around 14.4v

Think it may be time for a new 1


Thanks
Marc

hi mate how much do you charge for a big wing sump?

[Cochyn]

hi mate how much do you charge for a big wing sump?

Wrong MK

But sure he could have a crack at it

[twin turbo]

change regulator first as geir said. should be around 14v

[steveboyslim]

What is the current rating of the alternator you are using ?
Are the diameters of the alternator and crank pulley the same as original ?

Steve

[M K]

Will look into a new regulator

Steve - it's a 90amp alternator I believe and yes pulley size is as per oem

[c20tbo]

I have an issue i'm trying to resolve also on my other vehicle, i'm getting a constant 16v on everything, i'm also thinking my Alt reg isn't doing its job properly as its 14v

[twin turbo]

I have an issue i'm trying to resolve also on my other vehicle, i'm getting a constant 16v on everything, i'm also thinking my Alt reg isn't doing its job properly as its 14v

yes the reg is broken, change it before something gets burned...

[steveboyslim]

Will look into a new regulator

Steve - it's a 90amp alternator I believe and yes pulley size is as per oem

You may find that the alternator is not keeping up with demand with two fuel pumps, epas, heated screens, gearbox oil pump, diff pump, lights and wipers etc, I realise you rarely have them all on at once, but you can often measure a voltage drop with just a few of those running even if the alternator is running at maximum output.
Depending on idle speed the alternator may not be self excite so the battery voltage drops.
Either way I would be fitting a higher output alternator, you can get a 120 amp which fits with minimal or no modification.

Steve

[Turbo Lag]

mines is only doing 13.4 max what reg do I need ?

[Cochyn]

Take it to an auto electrician to have it tested. Did mine a couple of weeks ago, regulator (most common problem) needed replacing at £15 and bang, instant 14.4v on idle from 12.8v.

[Turbo Lag]

My AIM gauge says it's that so I will get a new reg do you need to take the alternater off to fit one ?

Sent from my GT-I9100

[RS Bowk]

Anything around 13.4/5 V or above is fine. As mentioned above 16V is too high and you will cause damage to items on your car.

Remember you should be taking your reading directly from the battery.

HTH