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Discussion Starter #1
so i've driven my car a lot today and it seemed fine, but then was having trouble starting, and now wont start...I think it is either the battery or the alternator...how would I tell so i'm not just wasting money on parts that wont fix the problem?

2000 focus zx3
~AEM CAI
~system
~neons
~Autolite double platnum spark plugs...
those are the only mods that i think would have any effect on it....thanx
 

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well you have neons and a system... i suspect its your alternator.. your alt recharges your battery as you drive and if you bump that system the whole time.. its using its power to run that.. thus not being able to fully charge the battery..

thats why it wont start because it didnt charge fully as you were driving earlier...

yank or turn the system down
 

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Try a higher output alternator that will help,but first check the water in the cells of your battery, if they are low only use DISTILLED water... If you have a warranty on your battery try that first otherwise you are gonna need to spend some money on a new alt. or like iceman said yank the system or tune it down, my bet is the battery though, check it now if you havn't already.
 
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