Battery - Alternator HELP

[bubbagumper6 5,000+ posts]

Okay, i just figured it came with a big one so why not try it.. my 110 stock alt idled and drove around 14 v and dropped 13.5 when bass hit, if i change the pulley will this idle like its supposed to..
nasty thinks otherwise.. really mind boggling and FRUSTRATING

All other things the same, changing the pulley will increase the alternator's rpm's at idle. That may not be your problem but I'm not sure why you wouldn't want the smaller pulley, in general you will get more output at idle.

 

[NASTY08IMPALA 5,000+ posts]

im willing.to bet its computer controlled.like.mine ..but swap the pulleys for shlts and gigs

 

[cbuts 10+ year member]

All other things the same, changing the pulley will increase the alternator's rpm's at idle. That may not be your problem but I'm not sure why you wouldn't want the smaller pulley, in general you will get more output at idle.

well im sure hoping it is the problem...

 

[NASTY08IMPALA 5,000+ posts]

thing.about the smaller pulley is.u might need a smaller belt. cause u might have some slippage due to higher spin rate

 

[cbuts 10+ year member]

thing.about the smaller pulley is.u might need a smaller belt. cause u might have some slippage due to higher spin rate

yes i will be looking for a 1" smaller belt , I REALLY HOPE THIS FIXES IT.

 

[NASTY08IMPALA 5,000+ posts]

yes i will be looking for a 1" smaller belt , I REALLY HOPE THIS FIXES IT.

i bet if u search ur car ppl will tell u if its computer controlled ..good luck

 

[cbuts 10+ year member]

i bet if u search ur car ppl will tell u if its computer controlled ..good luck

i really hope your wrong... lmfao

 

[Nutdawg651]

Its your battery sorry to say go to oriellys and get a batt and alt test it wouldnt matter if you change the pulley why you think it comes with bothgo get a load test and also , when you installed the alt did you upgrade the charging wire to 4 gauge with a 150 amp fuse? Major must

 

[NASTY08IMPALA 5,000+ posts]

Its your battery sorry to say go to oriellys and get a batt and alt test it wouldnt matter if you change the pulley why you think it comes with bothgo get a load test and also , when you installed the alt did you upgrade the charging wire to 4 gauge with a 150 amp fuse? Major must

no its not he just got.the batt 2 days ago smdh ...

 

[Nutdawg651]

I got a battery 2 days ago and its doin the exact same thing to me I got it tested today and it read bad cell im takin it back to get a new one smdh start with a load test it can read what you cant see smdh

 

[NASTY08IMPALA 5,000+ posts]

its the godddam computer lol

 

---------- Post added at 11:49 PM ---------- Previous post was at 11:48 PM ----------

 

quit buyin crap batteries lol

 

[NASTY08IMPALA 5,000+ posts]

its a chevy thing ..like i said until i externally regulated my alt i would be 14.6 driving.then at stops it would drop to 12.9..its pcm controled

 

[pacustomz 10+ year member]

Any 05 and chevy has a pcm controlled alt, it will go into economy mode and derate the alt. I had to get a module in order to make my dual alt set up work correctly

 

[NASTY08IMPALA 5,000+ posts]

Any 05 and chevy has a pcm controlled alt, it will go into economy mode and derate the alt. I had to get a module in order to make my dual alt set up work correctly

bingo

 

[mlstrass 5,000+ posts]

If it was PCM controlled he would have noticed it BEFORE installing the new alt. He said it was fine before the swap. Stock case rewound alt needs the smaller pulley as it has no output at idle.

I've installed a few DC alts on 05 Impalas and they were not PCM controlled. 14.9v all day at idle....