WTF...I dont get it
05-24-2009, 10:19 AM
#1
WTF...I dont get it Ok, so here is the problem...My volts were dropping into the red when I would get on the gas a little, so I had it checked and I changed the alternator. Cool it worked, until yesterday. Now as I come to a light and I sit there and idle the volts drop into the red AGAIN, but when I give it just a little bit of gas the volts rise back up to 13. What in the freaking hell is this car doing to me.....Please help......OH YEAH the battery tested good.
05-24-2009, 10:29 AM
#2
TECH Addict
If you are running a draw - like a/c on, cooling fans running, etc. when you stop and are at idle - say 800 RPMs - you are not spinning the alternator fast enough. As soon as you raise the RPMs the alternator starts charging. If the battery is fully charged and nothing is on it shouldn't drop into the red if you are only idling for a minute, but if you are running a few things it will drop gradually the longer you idle. If you have an underdrive pulley, the situation is a bit worse since the alternator is spinning even slower.
05-24-2009, 11:06 AM
#5
You may have a messed up excitor wire, can't hurt to replace that little bastard. When thiose things get old and worn down and sometimes beaten up from years of road debris, they cause all kinds of charging issues. Alternators going off and on, charging one second then not charging for 5 minutes. Then one day it'll be perfectly fine.
Another member just did this last week who had wierd charging issues. Just splice it in using BUTT connectors only, do not solder it. And splice it in way up high as close to the wiring harness as possible.
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