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The UK Hyundai Coupe Site Forum • View topic - Lights Dim Under Engine Strain?
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 Post subject: Lights Dim Under Engine Strain?
PostPosted: Fri Jan 15, 2010 10:31 pm 
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I'm really motoring now
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Joined: Wed Nov 04, 2009 9:46 pm
Posts: 162
Location: Staffordshire
Coupe: gen3
I've noticed a few times when reversing away from facing a wall in the mornings that my lights dim a little when putting the engine under strain (for example letting up the clutch without any revs to gently move back) It's not enough to cause any concern, but it's the little things like this that niggle at me :D

My battery seems ok, so I'm guessing this could be down to poor grounding in the engine bay? Or is it just another "one of those things" that can't really be solved?


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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 11:10 am 
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Picking up a bit of speed
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Joined: Tue Jul 10, 2007 9:22 pm
Posts: 952
Location: West Wales
Coupe: gen3
I used to get the occasional drain like that, ive got a type mr voltage stabilizer now and ive no problems at all.

They dont seems to sell the one i have now (ive had it 4 years) but they sell this one which does the same thing: http://sharkracing.com/acecart/bin/shop ... =070000000


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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 11:46 am 
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It'll be a consequence of the situation at idle - the alternator is barely putting out any juice so when you start to move off you're putting a greater strain on the system and relying more on the battery for powering the electrics. The battery voltage is somewhat less than the alternator hence the dimming. Furthermore, without any throttle the revs will drop as the clutch closes thus lowering the alternator output even more.

Mathew


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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 1:49 pm 
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Guess it's one of those things then :) would adding in some upgraded grounding help at all (The 'big three' type of thing)?


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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 1:53 pm 
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Surely just add more revs?


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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 1:57 pm 
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Joined: Wed Nov 04, 2009 9:46 pm
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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 2:00 pm 
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Joined: Fri Jun 22, 2007 8:06 pm
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Some Coupes will respond better than others to the grounding wires mod. Won't do any harm tho, so theres a guide in the DIY section if you're interested :thumbup

It's for a different gen, IIRC, but the theory is the same...


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 Post subject: Re: Lights Dim Under Engine Strain?
PostPosted: Sat Jan 16, 2010 2:05 pm 
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