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when the stereo's on the lights flicker and the car runs rough!

9C1 VT V6

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hi guys my car seems to have just recently had some electrical faults when I turn my stereo system on my car starts to run rough and all the lights flicker but when I turn the stereo off its fine its only just happened recently before then it was fine and its not the alternator cause i've had it tested
 

hotrod

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is the head unit factory one , do u have an amp on it something telling me its an earth leakage some ware maybe check ya battery as well and terminals
 

meady_183

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As above. If you have a big stereo, and by flicker you mean dimming when subs fire, ideally you should upgrade to a larger alternator but in saying that, a capacitor will fix this, and a new battery wouldn't hurt as well
 

9C1 VT V6

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its an aftermarket head unit with x2 subs running on an amp and x4 speakers amped and the electrical problem did'nt happen up until the other day and before that the stereo and everything else worked fine is it normal for them to eventually bugger up?
 

wraith

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I wondered when some one would suggest a cap. Sounds to me like something is loose more then anything. What sort of power is your equipment running? At a minimum I would get the battery and charging system tested (free in a few places)
 

9C1 VT V6

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sub amp pumps 1100w and the speaker amp 640w
 

wraith

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Peak RMS or actual RMS?
 

9C1 VT V6

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peak! cant remember the actual rms aha
 

showbags

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I'd be saying more a bad battery earth. Watts won't effect battery voltage. Current draw(amps) will. I run around 2000wrms and have have no voltage issues with engine running.
 

Tasmaniak

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Sounds to me like something is loose more then anything.

If everything was good and now this with no change in the system then my money would be on this also... specifically start looking at the amps ground cable.
 
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