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      08-30-2013, 02:18 AM   #1
08z4mroadster
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Battery / Engine start issue

I've dead battery then replaced a new AGM battery. First week run and start like dream but second week I almost need to jump start my Z4MR every morning. I'd charged the battery over night but still need the jump start.

Do I need new starter? (But when I jump start the car start pretty good) or something else like something else. Seriously I've no idea now.

Anyone has similar experience here??? How can I fix it???

Thanks ALL~~~
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      08-30-2013, 05:57 AM   #2
inTgr8r
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need to run electrical system diagnostics.
but it sounds like its not charging, which could be the alternator or something as simple as a bad connection.
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      08-30-2013, 11:22 AM   #3
08z4mroadster
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Thanks intgr8r
Car already in mechanic shop and ran all test and shown up all good. It has been 3 days and still can't find out what's happening..... I want my car back on street
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      08-30-2013, 12:07 PM   #4
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Alternator. Same thing happened to me. My bad alternator even killed my new battery. It best to put in new battery and alternator at the same time.
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      08-30-2013, 07:56 PM   #5
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At what mileage are alternators going at?
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      09-11-2013, 03:14 PM   #6
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Quote:
Originally Posted by elerner61 View Post
At what mileage are alternators going at?
bump.. going through this right now.
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      09-11-2013, 04:51 PM   #7
eunosracr
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My alternator crapped out at 50k miles. If you do need a new alternator get a new battery at the same time.
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      01-12-2014, 01:25 PM   #8
08z4mroadster
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I found it if I unplug the amplifier the car start perfectly every morning and Now I replaced another amplifier after 2 weeks this problem back again.

Would that be the radio unit or something else draining the power away???

Anyone got similar issue with that??? Stereo units drain the power of battery
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      01-12-2014, 03:03 PM   #9
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Quote:
Originally Posted by 08z4mroadster View Post
I found it if I unplug the amplifier the car start perfectly every morning and Now I replaced another amplifier after 2 weeks this problem back again.

Would that be the radio unit or something else draining the power away???

Anyone got similar issue with that??? Stereo units drain the power of battery
Maybe the radio is to suppose to tell amplifier to turn off, but the amp never turns off. I had a similar problem with a sub amp that got a signal from the radio to turn off, but many times it would not turn off amp.
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