Battery - Alternator HELP

[NASTY08IMPALA 5,000+ posts]

pcm regulation will not cause your battery light to come on when your using a stock plug. It will not cause your voltage to die at idle but be fine at cruising speed.
Your on the right track but your missing some key symptoms.

On several gm vehicles if you just trick the light sensor to keep the lights on all the time it'll keep you above 14.0v and wont throw a charging system error code, which some vehicles do if you bypass pcm regulation.

im not saying.that the pulley doesnt need.to be changed im saying.he will still have the pcm symptoms once he gets it straigtened out

 

[profundus-sanus 10+ year member]

im not saying.that the pulley doesnt need.to be changed im saying.he will still have the pcm symptoms once he gets it straigtened out

i don't think anyone is arguing that pcm regulation type symptoms wont occur.

I think we're all on the same page though, now.

 

[cbuts 10+ year member]

i don't think anyone is arguing that pcm regulation type symptoms wont occur.
I think we're all on the same page though, now.

Voltage fine. Batt light still on. Founders right nasty. Now how I get rid of it

 

[NASTY08IMPALA 5,000+ posts]

Voltage fine. Batt light still on. Founders right nasty. Now how I get rid of it

drive around for a while i bet ur voltage will drop..without the stereo ..what is ur voltage at now?

 

[NASTY08IMPALA 5,000+ posts]

sometimes it took mine 15-30 minutes to drop from 14.5 to 12.9

 

[cbuts 10+ year member]

sometimes it took mine 15-30 minutes to drop from 14.5 to 12.9

Sat in drive with break ac on and voltage stayed where it should for like ten mins. I need to get rid of this battight though. Ill be driving soon but I think voltage is fine now

 

---------- Post added at 08:05 PM ---------- Previous post was at 08:05 PM ----------

 

Isles 14.7 and with ac break on stereo off 14.3

 

[NASTY08IMPALA 5,000+ posts]

but then again if the batt light is still on and the pcm senses a charging problem it might not shut the alt down..this might work in your favor

 

[NASTY08IMPALA 5,000+ posts]

Sat in drive with break ac on and voltage stayed where it should for like ten mins. I need to get rid of this battight though. Ill be driving soon but I think voltage is fine now 

---------- Post added at 08:05 PM ---------- Previous post was at 08:05 PM ----------

 

Isles 14.7 and with ac break on stereo off 14.3

like i said if u get the batt light off u might drop down to 13 while driving like its suppose to do...if it stays at 14.7 after driving a while i would leave it alone ...u might have tricked the computer to keep the alt fully charging

 

[profundus-sanus 10+ year member]

Voltage fine. Batt light still on. Founders right nasty. Now how I get rid of it

you can probably pull the neg battery terminal for 15 minutes or so to reset the computer to have it go away. it's probably just a cel that needs to clear.

Edit: you could just wait a day or so of driving it and wait for it to go away. if its charging good now i wouldn't be too concerne.d

 

[cbuts 10+ year member]

you can probably pull the neg battery terminal for 15 minutes or so to reset the computer to have it go away. it's probably just a cel that needs to clear.
Edit: you could just wait a day or so of driving it and wait for it to go away. if its charging good now i wouldn't be too concerne.d

voltage stayed fine whole drive home around 14.7-14.9, half hour drive, stopped at harveys and it dropped to 14.5 lowest while in drive through so all seems to be fine, sounds normal and everything except if i accelerate really fast 3000+rpm it makes like a VRR and i feel a TINY vibration in the peddle, im not sure if this is normal, it may be with h.o alts.

anyways i unplugged my neg terminal and am eating my harveys, i will plug it back in in like a half hour and see what happens.

thanks both of yas much appreciated

 

[cbuts 10+ year member]

voltage stayed fine whole drive home around 14.7-14.9, half hour drive, stopped at harveys and it dropped to 14.5 lowest while in drive through so all seems to be fine, sounds normal and everything except if i accelerate really fast 3000+rpm it makes like a VRR and i feel a TINY vibration in the peddle, im not sure if this is normal, it may be with h.o alts.anyways i unplugged my neg terminal and am eating my harveys, i will plug it back in in like a half hour and see what happens.

thanks both of yas much appreciated

p.s my buddy got the belt, it wasnt made for my car, but same amount of ribs, and the guy told him it was just shy of an inch shorter, ( although they kkinda looked the same matched up) either way it fixed my voltage issue.

 

[NASTY08IMPALA 5,000+ posts]

you can probably pull the neg battery terminal for 15 minutes or so to reset the computer to have it go away. it's probably just a cel that needs to clear.
Edit: you could just wait a day or so of driving it and wait for it to go away. if its charging good now i wouldn't be too concerne.d

exactly id leave it alone if its staying that high ...i wouldnt risk the conputer kicking in if u clear the code

 

[cbuts 10+ year member]

exactly id leave it alone if its staying that high ...i wouldnt risk the conputer kicking in if u clear the code

well i just want my car to function normally is all.. lol

 

[cbuts 10+ year member]

light still on.. what else could it be.. alternator made a wierd noise when i turned the key before i started it too, voltage staying past 14.5

 

[cbuts 10+ year member]

you can probably pull the neg battery terminal for 15 minutes or so to reset the computer to have it go away. it's probably just a cel that needs to clear.
Edit: you could just wait a day or so of driving it and wait for it to go away. if its charging good now i wouldn't be too concerne.d

^^^^^