Jump to content
SAU Community

Flat battery

JH32

By JH32,
in General Maintenance

 Share

Recommended Posts

JH32 Grand Master

JH32

Posted
Posted

I parked my car in the garage last night, and just then I tried starting it.

The stereo comes on, the fuel pump primes, all the dash lights come on ... but it hasn't got enough battery charge to kick the engine over :confused:

I didn't leave my lights on overnight, or the interior light or anything.

Do I need a new battery?

Could it be the alternator?

This has happened a few times now, and I just keep recharging the battery.

Link to comment
https://www.sau.com.au/forums/topic/19378-flat-battery/
Share on other sites
Bleach1 Proficient

Bleach1

Posted
Posted

How old is your battery? An old battery can sometimes be charged but wont hold charge. Do you have a multimeter? If so plate it across the battery terminals while the car is running. You want a reading of around 13 to 13.9 volts. That is the alternator charging. Bellow that and its the alternator.

Link to comment
https://www.sau.com.au/forums/topic/19378-flat-battery/#findComment-407739
Share on other sites
blind_elk Grand Master

blind_elk

Posted
Posted

In addition to what Bleach1 suggested, you should also try increasing the revs while checking the battery voltage. It should stay at roughly the same voltage. If it increases the more you rev the engine, then the regulator is stuffed. That allows the battery to overcharge, and it eventually gets to the point where it can't hold the charge.

You will most likely need a new battery, and you may need a new alternator.

Link to comment
https://www.sau.com.au/forums/topic/19378-flat-battery/#findComment-407919
Share on other sites
StockNissan Apprentice

StockNissan

Posted
Posted

Also some batteries have small plugs which you can unscrew and you have to top each compartment with distilled water. If your battery is running low on water then it wont hold the charge.

Some batteries are maintenance free, so there is nothing you can

do about it. Also check your brake pedal switch.

Link to comment
https://www.sau.com.au/forums/topic/19378-flat-battery/#findComment-408488
Share on other sites
JH32 Grand Master

JH32

Posted
  • Author
Posted

Cheers for the replies guys ... I haven't checked the forums for a while so I didn't see them earlier.

I haven't done anything with the car yet as I've been working like a madman but I will look into all the things you suggested ;)

Cheers dudes :)

Link to comment
https://www.sau.com.au/forums/topic/19378-flat-battery/#findComment-417883
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Ticking Sound On Idle - Rb25

      By MBS206 · Posted

      Have you put an aftermarket oil pressure gauge on and verified your oil pressure?   Noise being on the block, on exhaust side, how high up the block does it seem to be? It could be the VCT system getting cranky, especially if it's mainly at idle, and when warm, as that'll be your lowest point for oil pressure. Could be showing that oil passages / VCT solenoid are blocking.
    • WARLORD
      injectors top feed for sale

      By WARLORD · Posted

      Deatschwerks 1800cc sold
    • GTSBoy
      Ticking Sound On Idle - Rb25

      By GTSBoy · Posted

      Well, hydraulic lifters will get noisy if they are dirty/fouled in some way, and exactly how that manifests will depend on exactly what schmutz is where. There is a procedure on here somewhere for dismantling and soaking/cleaning them. Replacing them with new is about 50% of the work and about 5% of the money!
    • myrbgivesmeheadaches
      Ticking Sound On Idle - Rb25

      By myrbgivesmeheadaches · Posted

      Thanks for the reply @GTSBoy this is is a hydraulic lifter engine. Yea right i did not realise the lifters were supposed to be compressible while installed. I could push them down but i had to lean almost my while body weight on them.  I have never heard of a lifter/ lifters ticking only at hot idle and getting worse the hotter it gets. I have owned a few jdm cars with noisy lifters. This noise is slightly more subtle, it is more of a sharp gentle metalic tic than the solid and more loud tapping I've heard on lifters. I have used a metal rod, alloy tube, hose and stethoscope and could not find the source of the tick. But it appears to be loudest on the actual engine block behind the exhaust cam gear and next to the oil filter. I had mate (40 year old mechanic) go over it with me and he couldn't find it either..  Could it be a cam seal issue of some sort?  Cheers  
    • GTSBoy
      Ticking Sound On Idle - Rb25

      By GTSBoy · Posted

      This seems problematic and unlikely at the same time. Vanilla RB2Xs have hydraulic lifters. They do have "zero" clearance, but only when running with oil pressure inside them. When not running, you should be able to compress them and obtain heaps of clearance. RB26s and Neos have solid lifters. They should have ~0.3mm and ~0.5mm on the inlet and exhaust respectively. If they have zero clearance then bad things are happening. With nothing else being wrong, it would mean that the valves would be held slightly (ever so slightly) open when they are supposed to be closed and it should have all sorts of problems when running, caused by leakage in/out through the valves. Or, zero clearance can indicate severe valve seat recession. None of it is good. Have you used a piece of hose as a stethoscope to try to localise the noise?  
×
×
  • Create New...