Really Need Help

[Omni1026]

Well i am new here and my car is a s13 with a r33 rb25det s2 and i did the swap myself and got it done some months ago and be trying to sort out minor stuff...i have driven the car and even though because of a bad maf i couldnt really enjoy it i started noticing smoke coming off the alternator one night i stopped at a friends house..so a couple days later the battery died so...i said ok it was the battery cause it was a junkyard battery i was using...so now i borrowed a friend optima battery and i decided to put my hand on the alternator while the car wasnt moving or on or key turned on nothing and i just felt the alternator keep getting hotter and hotter to the point i couldnt keep my hand on it any more...i have double checked everything literally a million times and i am stumped as to what could be causing this problem..please help me i really would like to drive my car without worry about killing a 4th battery..And thank u guys so much ahead of time

Edited August 1, 2011 by Omni1026

[MrStabby]

You probably should specify what you've checked, and how. We may have a different idea of what 'everything" means.

[DVS JEZ]

It may be overcharging. Get a multimeter and check the battery volts when idling. Raise the rpm and check the battery volts.

If there is any signs of an overcharging alternator it needs to be replaced

[Omni1026]

It may be overcharging. Get a multimeter and check the battery volts when idling. Raise the rpm and check the battery volts.

If there is any signs of an overcharging alternator it needs to be replaced

well sir could it be the wireharness that fubbared?? but i will actually go pick up a multimeter today and see what i get.

and as for stuff i check...i went over the engine harness...i checked all my grounds..even added more...and also go a new lowerharness to make sure the old one wasnt shorting out

also just to make sure is there suppose to be a ground on the back of the alternator casing?? i just wanted to make sure and if so can someone show me a pic of where exactly it should be and thanx again

Edited August 1, 2011 by Omni1026

[SargeRX8]

When an electrical component is running efficiently, or shorting, it overheats due to wasted energy. But since the alternator also has moving parts, something could be warn internally and friction is causing excess heat. If your electronics are overvolting, you would have probably killed some crucial electronic components but its a good idea to check out the voltage asap. Any fuses popping?

[Omni1026]

When an electrical component is running efficiently, or shorting, it overheats due to wasted energy. But since the alternator also has moving parts, something could be warn internally and friction is causing excess heat. If your electronics are overvolting, you would have probably killed some crucial electronic components but its a good idea to check out the voltage asap. Any fuses popping?

no no fuses pop my ecu is not fried nothing everything is fine and all my fuses are fine...also i forgot to mention that the alternator get super hot while the car is not running and the battery is just hooked up...the only bad thing with this is that i keep destroying batteries so gave my car the nickname "battery destroyer" hahaha anyway also i forgot to mention that i can take out my alternator fuse and the car will still have power to it...so this thing is tripping me out hard

[DVS JEZ]

^^^ thats a big difference to ur 1st post. So it does it with the engine off meaning its either a wiring problem or the alternator has collapsed internally. Go see an auto elec

[Omni1026]

:/ :/ really now i am super sad but on a good note hahahaha i did buy the mulitmeter...just couldnt use it yet cause the stupid battery is dead

[StevenCJR31]

Can you borrow an (or have a spare) alternator and try that? it wouldnt take long to swap them out or ,as stated above, take it to an auto electrician who have multimeters and all the testing gear that you could think of

[Omni1026]

Can you borrow an (or have a spare) alternator and try that? it wouldnt take long to swap them out or ,as stated above, take it to an auto electrician who have multimeters and all the testing gear that you could think of

the issue is where i live not alot of rb or rb parts around...or else i would have gladly bought a new one

[SargeRX8]

eBay or the forsale section here. You will almost definitely be able to find one and someone can post it out to you.

You have either shorted something out or that alternator is f**ked. You can get them reco'd.

[Omni1026]

eBay or the forsale section here. You will almost definitely be able to find one and someone can post it out to you.

You have either shorted something out or that alternator is f**ked. You can get them reco'd.

well i am going over the harness as i am typing this but my question is does the alternator have a ground on the back of the casing or what??

[SargeRX8]

The whole alternator is bolted to the engine. The whole thing it self acts as a ground I believe. I can't recall if it has a dedicated ground but when my last motor was pulled to sell it had the red power cable coming out of it. I can't recall for sure as I have never had to deal with the alternator but I can find out(others can to and others might know).

Just get a wiring diagram and check it out.

[blind_elk]

well i am going over the harness as i am typing this but my question is does the alternator have a ground on the back of the casing or what??

Here's the back of my alternator - I think it's a RB25 alternator, it's on a RB25DET in a R32.

[Omni1026]

Here's the back of my alternator - I think it's a RB25 alternator, it's on a RB25DET in a R32.

thats is a s2 alternator and it really doesnt seem to have a ground so i guess i dont need one then...so that a questions thats gone out my mine thanx alot guys...and i may have figure out the problem will keep u guys posted and thanx alot for the help i really wanna drive it for a long period of time without worrying

[Omni1026]

:( well guys i back with another question and didnt want to make a new thread so i figured i would revive this one..Anyway on to the problem i have had this problem for far too long now and would like for it to go away its really upseting me...everytime i plug in my maf the car dies and its really annoying i cant drive my car like that in loop mode no more its really upset me i cant enjoy my car period because of this stupidness...so my question to u guys is

1..Where to u hook ur 12v power source up to cause everything i hook mine up to causes another problem on the engine..so i could like to hear from someone who has done it and have no problem

2. how does the signal ouput for tme afm really work cause i never touched those 2 wires just extended them like i should during the harness conversion but just asking to make sure i didnt do anything wrong

3.WHY DOESNT MY RB LIKE ME :( :sick: