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<blockquote data-quote="Sarthos" data-source="post: 5993619" data-attributes="member: 610335"><p>My car has problems with the lights dimming and the voltage dropping when my car is idling. I have a volt meter on my dash and it will say between 13.5-13.8 volts while I&#039;m driving, but as soon as I stop it goes down to 11.9-12.1. If I&#039;m stopped for quite a while it drops down to 11.5 or lower sometimes. I&#039;m just wondering why the heck my system would do this? I have a 170 amp alternator and a Stinger SP1000 battery in the rear, with 1/0 gauge monster wire going from the alternator to the battery, 1/0 monster from the battery to a shiny spot on the engine, and 1/0 monster from the battery to the frame. The voltage also doesn&#039;t normally shift when I&#039;m drawing lots of power. If my radio is on 0 and my lights are all off, fans are off, etc. and the meter reads 13.8, I can crank the radio, turn on all my lights (which draws over 400 watts) and fans, etc. without even making a tiny ripple in the voltage. So I&#039;m wondering, could the problem be related to the alternator, the regulator, the battery, the wiring, or is it likely that my underdrive pulley is the culprit? Any suggestions would be greatly appreciated //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p></blockquote><p></p>

[QUOTE="Sarthos, post: 5993619, member: 610335"] My car has problems with the lights dimming and the voltage dropping when my car is idling. I have a volt meter on my dash and it will say between 13.5-13.8 volts while I'm driving, but as soon as I stop it goes down to 11.9-12.1. If I'm stopped for quite a while it drops down to 11.5 or lower sometimes. I'm just wondering why the heck my system would do this? I have a 170 amp alternator and a Stinger SP1000 battery in the rear, with 1/0 gauge monster wire going from the alternator to the battery, 1/0 monster from the battery to a shiny spot on the engine, and 1/0 monster from the battery to the frame. The voltage also doesn't normally shift when I'm drawing lots of power. If my radio is on 0 and my lights are all off, fans are off, etc. and the meter reads 13.8, I can crank the radio, turn on all my lights (which draws over 400 watts) and fans, etc. without even making a tiny ripple in the voltage. So I'm wondering, could the problem be related to the alternator, the regulator, the battery, the wiring, or is it likely that my underdrive pulley is the culprit? Any suggestions would be greatly appreciated [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] [/QUOTE]

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