battery randomly dies....need help
Thread Starter
TECH Resident
Joined: Sep 2007
Posts: 793
Likes: 0
From: Phoenix,AZ
battery randomly dies....need help So for the past few weeks after i had my trans built and got it back the car was running great, now i went out to start her up after sitting for a few days and the battery is dead. I charged it up and it started but as the car was running the volt gauge was going up and down as if the battery was dying while the cars running. It has a new battery in it and like i said the car was running great for the past couple weeks since i got it back from the trans guy. Any info would be greatly appreciated.
Sounds like a dying alternator. Check to make sure the connections are tight, no corrosion, and that the pigtail is plugged in well, the wire off it isn't cut or melted. Check your grounds for corrosion and tightness. It's entirely possible that Snuffy didn't snug a bolt that grounds the engine down good and tight.
Thread Starter
TECH Resident
Joined: Sep 2007
Posts: 793
Likes: 0
From: Phoenix,AZ
yeah ive only gone by the volt gauge in the car but the needle goes up and down and you can hear the car sound like its not getting full power. After i charge the battery and start the car if i go out like 2hrs later it wont start anymore
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Apprentice
Joined: Feb 2005
Posts: 384
Likes: 0
I'd test the alternator, as well as test for parasitic drain with the car off -- should be no more than 20~30 mA (0.020~0.030 Amps) after the retained accessory power system shuts off. Can elaborate if you wish.
[Edit] Kinda already been mentioned, but definitely check the electrical connector on the back of the alternator. That's the exciter wire which basically tells the alternator when to charge. The female pin in my connector broke and caused a lot of voltage fluctuations due to poor contact -- until I found the problem.
[Edit] Kinda already been mentioned, but definitely check the electrical connector on the back of the alternator. That's the exciter wire which basically tells the alternator when to charge. The female pin in my connector broke and caused a lot of voltage fluctuations due to poor contact -- until I found the problem.
Last edited by Alex94TAGT; May 3, 2012 at 06:22 PM.
Btw make sure the ground for the alternator is plugged in..I forgot this on my car once.
Try getting a new alternator they're not crazy expensive, or see if you can swap with a buddy that has an LT1 real quick.
Try getting a new alternator they're not crazy expensive, or see if you can swap with a buddy that has an LT1 real quick.
