Member Since: 21 Oct 2019
Location: Herefordshire
Posts: 44
Alternator question
Right I’ve just rebuilt the compressor after the dryer was damp. Now the battery reads 12v when the engine is started the alternator charges at 14-13.9v is this normal.
What I’m seeing is when the car first starts I have to Rev it a little to produce more power for the compressor otherwise comes up with fault. After a 2 -3 min it’s fine.
26th Feb 2021 10:46 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10374
It's not normal.
Maybe you have a non Denso alternator ?
Is the battery light remaining on sometimes ?
However if the suspension is in good order and raised, does it give you a problem ?
26th Feb 2021 12:26 pm
Day101
Member Since: 21 Oct 2019
Location: Herefordshire
Posts: 44
It could be I don’t know if I’m honest. No light comes on the dash. Suspension works fine now. Put a cheap battery tester on it and it comes up bat ok fault alternator. Tested with multimeter and ticking over got 14v
26th Feb 2021 1:02 pm
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1115
A charged battery is 12.9v - an alternator charging at 14v is ok. A battery at 12v is quite low.
27th Feb 2021 2:33 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1783
Initially, ign off, battery voltage should be 12.4 to 12.8. Ign on and engine just started, alternator voltage should be 14.4 to 14.8. So from what your are saying you have a dodgy battery or faulty alternator.
27th Feb 2021 4:37 am
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1815
A 12v battery at 12V = 100% empty!
Starting the engine, will deepcycle it...Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum