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03 MCS still runs when key is turned off

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Old 06-02-2011, 11:36 AM
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03 MCS still runs when key is turned off

Kind of a weird problem just started a few days ago. When you turn off the ignition the engine continues to run just as smoothly as when its on..for about 3 seconds ..for the 8 yrs I have owned it the engine has always turned off immediately unlike the last few days. Also the dash lights and needles go a bit wonky on that 3 sec delay..I know in the past when i was in need of a new battery the guages would go wonky on startup,, needles would bounce lights would flash . Next two days I was buying a new battery , which was about a month ago ....so I am ruling out the battery bit....Im stumped
any ideas
 
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Old 06-04-2011, 03:43 AM
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looks like I stumped the whole forum........didnt expect that...oh well thanks anyway
 
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Old 06-04-2011, 03:48 AM
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Not sure if it helps, but just because a battery is new doesn't rule it out. There may be a charge issue that caused the other battery to go bad and after a month it is showing on the new one. Lots of short trips will often cause charge issues to show up. Long trips tend to keep the battery topped off better.

Does giggling the keys seem to do anything. Ignition seems to be a good place to start too.
 
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Old 06-04-2011, 06:41 AM
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Sounds like the switch is failing....
Some electronics safe contact cleaner might help a bit...
Assuming the contacts in the switch are pretty dirty/worn....and it takes a few seconds for the signal (or lack of one) to pass the threshold needed for the computer to recognize the signal...
A quick spray...let it try...try it out...just don't overdoo it!
 
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Old 06-04-2011, 11:10 AM
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i`ll give it a try... thanks....its just weird nothing is wrong with it running and it dosent have that old car detonation when u turn it off it just keeps running .....DAMN GREMLINS.....
 
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Old 06-04-2011, 04:39 PM
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I'd go with the moving part "ignition switch" as a starting point.
 
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Old 06-05-2011, 06:41 PM
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Seen the ignition switch cause this, if you need one let me know we could get you a used one too.
 
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Old 06-06-2011, 12:43 PM
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Thanks everybody for all of the input and advice.... But the Gremlins dissappeared on their own..will definately keep in mind the ignition bit if it happens again.....My mini is getting up there in age...on my second engine, and power steering pump....killed the first engine by being an idiot.....bound to have a few problems here and there......so ill keep ya posted.....
 
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