strange things after disconnecting the battery - Taurus Car Club of America : Ford Taurus Forum
 
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post #1 of 5 (permalink) Old 04-23-2012, 05:25 PM Thread Starter
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strange things after disconnecting the battery

I D/C my battery today for about 30 minutes. once I put it back and made sure the connections were tight I have a really rough idle and its really jumpy sometimes, also this high pitched whine which I can only hear when im under the car has deviloped. any ideas? thanks!
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post #2 of 5 (permalink) Old 04-24-2012, 03:51 PM
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Um... if you climb under your car while it's running, we're going to read about you in the papers... unless you have a mechanic's pit or a full car lift.

Meanwhile -- whine -- not the transmission? Or the power steering pump?

If your idle is loping up and down, check the IAC, idle air control valve. There used to be big fights here about whether they can be cleaned, but I've always cleaned mine (off the car, with sensor-safe throttle body cleaner) and they work for years after.

It's actually a kind of motor that turns a valve back and forth. They get gunked up and the valve bit gets hard to turn. Of course, it's possible that the windings on the motor have given up, leading to replacement.

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post #3 of 5 (permalink) Old 04-24-2012, 11:02 PM
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After the battery disconnect, did you perform the cold & warm idle relearn proceedure???
If not, disconnect the B- cable again to wipe the KAM & do the cold & warm idle relearn proceedure here Can Someone Tell Me How To Reset My Check Engine Light? & let us know how it goes.

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post #4 of 5 (permalink) Old 04-24-2012, 11:59 PM Thread Starter
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I'll try the re learn tomorrow! I disconnected it in the first place because I was told if i reset the computer it'd help with my spark knock.
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post #5 of 5 (permalink) Old 04-25-2012, 01:03 PM
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It'll relearn on its own. Just takes time (a few drive cycles).
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