new alternator 140amp(hurry help) - BMW Forum

moe_j · 03-09-2006, 09:31 PM

hey guys,
please please some body help here. long story short. i instal new alternator today on my 325i 94. the new one is 140amps and old one was 80amps.
and after i was done puting that alternator i wanted to start the car. but i had to get jump start, car did start with jump start and got shut off by it self after 2sec and after that i could'nt start my car at all not even with jump start from another car. it looks like dont have enogh bost to crank the starter or engine. or maybe i put 140amps alternator? i dont know im kinnda pissed off work all day on my car and nothing happened.
please help me out any suggetion guys, please hurry i dont have another car to drive
thnx

:

Furious · 03-10-2006, 02:43 AM

hmm did you take the intake off? i bet you might have put the Mass air flow backwards

mehumming · 03-10-2006, 07:56 AM

If you disconnected your battery you may still have a loose connection ...
When you try and start the engine large amounts of electrical current are drawn from the battery through the leads, if one or both leads are loose you can get those results...
check leads?
faulty alt?
Personaly i have rebuilt alternators and if faulty, they can load the motor with no output and stall motors >>..

good luck, Nathan.

moe_j · 03-10-2006, 12:13 PM

i didnt take off the intake but i did disconected the air filter box from the intake but it still conected with leads under the filter box. one question
b+ wire one the alternator is positive?and
d is negetive? im just making sure if i put them right. or wat would happened if i put them wrong. please help me out here
thnx agian

Furious · 03-10-2006, 12:42 PM

do you tihnk you put the leads on wrong? im not too sure what would happen to be honest.. one binding post is bigger than the other, as is the "O" ring connectors on teh wires, (ones bigger than the other)..

moe_j · 03-12-2006, 03:31 PM

hey furious thnx for the reply tho. every thing was fine. all i had to do is just give a little gas whille i was starting the car after that it was fine car is runing
perfect, even i noticed car is runing more smoother than the stock 80amps alternaotr. i dunno maybe its only me. cause i know i put 140amps alternator. it just in my mind. but i do felt little bit diffrence in smoothness.
tnx again

Furious · 03-12-2006, 05:31 PM

glad it was something easy, lol i thought it would be something difficult, i didnt post the easy possiblities