Jump to content
SAU Community

Issue with alternator/headlights

yUBER

By yUBER,
in General Maintenance

 Share

Recommended Posts

yUBER Contributor

yUBER

Posted
Posted
Issue with alternator/headlights

So my r32 gtst is having this problem where my car batteries would die the next day so i changed the car batteries 3 times and the problem persist. I figured maybe it was my alternator so i got a multi-meter and tested it the numbers coming in were in the normal ranges. I tried all the load test and they came back normal but the one thing i noticed was when i had my headlights on and i revved the car the voltages would drop on the meter down to not so normal ranges around 12 volts. On idle everything is normal but when i rev up the car around 1500-2000 it goes down only when headlights are on any idea what could be the problem?

Link to comment
https://www.sau.com.au/forums/topic/469387-issue-with-alternatorheadlights/
Share on other sites
89CAL Grand Master

89CAL

Posted
Posted

Why say "I got normal numbers"? wouldnt it make more sense to give actual voltage readings? not trying to be rude but perhaps they are not normal numbers.

It sounds like the altenator is not able to keep up with high load, so above statement is possibly correct. More info needed

tridentt150v Grand Master

tridentt150v

Posted
Posted

flux capacitor needs replacing...lol

Take the alternator out and get it checked by an auto sparkie shop....they have the best test rigs for this and generally they will test for nothing or at worst nominal cost.

yUBER Contributor

yUBER

Posted
  • Author
Posted

Sorry i assumed people would know what normal voltage readings is if they knew about what i was talking about lol. The voltage reading is around 13.90v-14.30v on idle no load with load 14.11v - 1370v with headlights on only it idles about the same but when revving the engine it drops too around 12.38v. Probably is the alternator thanks for the quick response.

niZmO_Man Grand Master

niZmO_Man

Posted
Posted
On 04/03/2017 at 7:33 PM, Robzilla32 said:


This - you haven't installed an amp recently? Probably obvious but I did this recently and the battery was draining super quick.

I was actually trying to diagnose issues with HICAS, upping the earth strap definitely helped. But yes I have an amp (two actually haha).

  • Like 1

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

    • JC71
      98 R34GTT 4k engine stumble

      By JC71 · Posted

      neither stumble or cut really seem to be an appropriate term....hard to explain its like a rev limiter but at 4k, but it violently shakes engine and entire vehicle as the rpms will not rise over 4k, even with slow acceleration. as soon as it hits 4k, it sounds like entire spark is lost entirely. plugs were 1.1 which I used as such, but later put in new plugs gapped down to .8 changed back after issue arose when I replaced the coils, still does it with either plug gap...damn and it was all running so good.
    • TurboTapin
      Why am I hitting a power wall with my stroked RB25?

      By TurboTapin · Posted

      Oh how times have changed! I actually lean it out relative to my water/methanol injector duty cycle. The methanol adds a lot of fueling and you can then lean it out even more due to reduced knock. 
    • Dose Pipe Sutututu
      Why am I hitting a power wall with my stroked RB25?

      By Dose Pipe Sutututu · Posted

      Yeah my thoughts are the same, a well thought out WMI setup, would be slightly ahead of just straight E85 and you're also chemically intercooling the charged air, dropping it even further. This is why you need to add so much more fuel as soon as you spray. I remember someone taking me through their set up before (Dennis, has a R33, lives around Cabramatta - no idea if he's still around on this forum). He would target AFR 10:1 on 98, then as WMI ramped on, AFR would lean back up to 11:1. Amazingly, he did this all through his PowerFC, a relay to cut power to his EBC solenoid if there was not enough line pressure on his WMI kit. And of course, if there wasn't any boost made above gate pressure, you wouldn't be accessing the load cells with heaps of timing for WMI. One downside to that rudimentary setup, once the WMI came on, the EBC would unleash the dragon, and of course all the timing. Tyres would fry lol.
    • MBS206
      RB25DET with solid lifters - which cams ?

      By MBS206 · Posted

      Shimmed or shimless, still solid, no hydraulic pump up stuff.
    • MBS206
      NC MX5

      By MBS206 · Posted

      They have said food will be limited. Mainly meat pies and sausage rolls from memory. But they have a coffee van!
×
×
  • Create New...