Please HELP

[RedandBlackgt]

Ok, so my car has been acting up when ever the rpms go over 2400 all of the lights get brighter and the voltage gauge goes from the center all the way to 18 and the low antifreeze and battery lights come on. I have thought about it and I am still at a loss any help would be greatly appriciated!

 

[jfor441]

You thought about getting your battery and/or your alternator checked?

 

[GREG@SN95]

Maybe you got struck by lightning?

Idk... big problem somewhere... never heard of anything like this

 

[Steven]

Have the battery checked.. if it's good, have the alt check, if thats good, then go check out the grounds for the harnesses.. you might have a skinny ass wire on it thats about to break. 90% of all electrical problems tend to be from bad grounds

 

[Hybridbird]

The regulator in your alternator is going bad....time for a new alternator,QUICKLY.

 

[Jrgunn5150]

The regulator in your alternator is going bad....time for a new alternator,QUICKLY.

Agreed, it probably already is bad. You might be pumping 16-17 vot's into your battery right now.

 

[RedandBlackgt]

Well I bought a new alternator and put it on and now it dose it all the time regardless of rpm So i switched the optima out of my 65 and that didn't help. I got a voltmeter and your right its putting out 17.6 volts. I'm really puzzled and I have parked the car till I figure this out.

 

[voidfinger]

wow that really sucks... i know nothing about that but it popped in my mind... bad ground maybe?

 

[Mr. OAM]

Go to the library and look into the Mitchell's Manuals for the flow chart on how to diagnose this problem. It will walk you through the process using a volt/ohm meter.

Since you are getting too high voltage from your alternator, and it is presumed to be good since it has been replaced, then it has to be something in your wiring. Either the alternator thinks it needs to put out more juice (car believes there is a high electrical demand) or something is telling the voltage regulator that it is not really putting out 14 volts, so it is compensating. There's two possibilities and there are always 5.

The Mitchell's manuals have helped me fix a lot of cars. Some libraries don't carry them anymore though. Instead the have computers that will tell you which libraries have them........which is what the one in my town is like. They don't have much of what I need, but they can tell me how far I have to drive to find it, bastards.


Steve

 

[BrandoGT]

Go to the library and look into the Mitchell's Manuals for the flow chart on how to diagnose this problem. It will walk you through the process using a volt/ohm meter.

Since you are getting too high voltage from your alternator, and it is presumed to be good since it has been replaced, then it has to be something in your wiring. Either the alternator thinks it needs to put out more juice (car believes there is a high electrical demand) or something is telling the voltage regulator that it is not really putting out 14 volts, so it is compensating. There's two possibilities and there are always 5.

The Mitchell's manuals have helped me fix a lot of cars. Some libraries don't carry them anymore though. Instead the have computers that will tell you which libraries have them........which is what the one in my town is like. They don't have much of what I need, but they can tell me how far I have to drive to find it, bastards.


Steve

I agree with this, I was going to say Regulator but you replaced the alternator and also I know that if your battery is not fully charged when you put the alternator back in it will over heat/ output too much. I learned this the hard way after my PI headswap. Anyways if it thinks there is a high demand of power it is probably something being grounded out, possibly your coolant sensor since the light is on? just an idea