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#1
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2002 E53 3.0i Intermittent no crank/start
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#2
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Have you measured voltage of your battery ? How new is it? Sounds a little like the battery has deteriorated inside. I had a car once where you could only start it if you jiggled the battery..In that case it was time for a new battery.
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#3
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I have not measured it yet, it’s snowing pretty badly out right now so once it dies down i’ll go out and check.
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#4
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It’s a common issue for the e53 ignition switch to fail with those symptoms.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#5
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I know this and i’ve come across it here on the forums multiple times but would it really work again after wiggling the cable? that doesn’t make sense to me.
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#6
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I missed the query about the BST. You can determine if it’s bst by measuring voltage from B+ to ground under the hood before and after the tug.
If you have no voltage at B+ before tug and after you have voltage it’s the BST. BST could only act like this if not activated by an accident. The BST when blown has barbs that prevent the contact from closing.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#7
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Quote:
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#8
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quick question, would it be acceptable to check at the B+ in the engine bay?
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#9
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That’s where you have to test it. If the BST opens there will be no per there.
Caveat: it’s possible to just become high resistance and you’ll still read voltage until you attempt to pull current so if at first you read voltage, then check while attempting to crank
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#10
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Mine does the same thing. I just turn the key off and try again and it always spins the starter the second time. So I'm thinking probably the switch. At my mileage, I can't complain.
2002 X5 3.0 370,600 miles 2014 428i 65,200 miles 2004 325i sold at 123,600 miles 2001 325i sold at 66,000 miles 1970 Firebird Under restoration |
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bst, intermittent starting, no crank, no start |
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