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My mk3 si 1.6 keeps going flat.

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tom01793

Post subject: My mk3 si 1.6 keeps going flat.

Posted: Tue Sep 26, 2006 11:28 am

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EvilDes

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Posted: Tue Sep 26, 2006 11:59 am

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tom01793

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Posted: Tue Sep 26, 2006 12:02 pm

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Percy

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Posted: Tue Sep 26, 2006 12:32 pm

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tom01793

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Posted: Tue Sep 26, 2006 12:39 pm

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jdfiesta

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Posted: Tue Sep 26, 2006 12:54 pm

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Joined: Sat Mar 05, 2005 7:28 pm
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Location: Doncaster!
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something's draining the battery. check you auxilary stuff.
do you have an amp+sub? if so try disconnecting the amp and see if that makes a difference then. also check that boot interior light is going off when tailgate is shut

JJ

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tom01793

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Posted: Tue Sep 26, 2006 1:16 pm

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Joined: Tue Jun 06, 2006 3:03 pm
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yea have thort of that when i had the AA out they did a power test on the battery cables it showed there was no power comeing from the battery???

tis drivin me up the wall lol

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djkevess

Post subject:

Posted: Tue Sep 26, 2006 2:16 pm

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Joined: Wed Aug 23, 2006 9:43 am
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Location: St.Helens

I had the exact same problem when I got my si. Bought a new battery, everythin seemed fine....until the morning. Completley flat again. Jumped started it with leads, started fine so starter motor was ok. I tested the voltage on my battery while running.... 10V

Should be 14V ish. So replaced the alternator Ãƒâ€šÃ‚Â£10 from scrap yard. Problem solved

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tom01793

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Posted: Tue Sep 26, 2006 2:42 pm

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Joined: Tue Jun 06, 2006 3:03 pm
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yea i thort that but after i have been drivin it seem fully charged only when i leav it it goes flat u think it is the alternator drain the battery but the aa said they could not find a drain on the battery from the main cables connected to it.

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EvilDes

Post subject:

Posted: Tue Sep 26, 2006 3:09 pm

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The alternator may not be charging your battery properly, so although it may seem fine after a bit of a drive, it actually may not be fully charged, therefore not holding any life it has in it. Alternator shouldn't be draining any power, which is why it would not have shown up on a test for drainage

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tom01793

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Posted: Tue Sep 26, 2006 3:20 pm

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Joined: Tue Jun 06, 2006 3:03 pm
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ok if u think it could be that it just seems to be very strange realy.
so u think it will be the alternator.

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Pulsator

Post subject:

Posted: Tue Sep 26, 2006 11:47 pm

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Joined: Thu Jul 27, 2006 10:20 am
Posts: 115
Location: Bradford,West Yorkshire

I ahd this problem with one of my old fezzies and then mine started doin it while driving when i called out the rac they checked it all over n it ended up bein coroded terminals on the cable tht connected to the starter motor !!!

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EvilDes

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Posted: Wed Sep 27, 2006 8:06 am

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jdfiesta

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Posted: Thu Sep 28, 2006 9:16 am

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start the car. use a multimeter to check voltage on battery. should be ~14v
JJ

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