2005 Chevy Lumina HELP

2005 CHEVROLET LUMINA
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CHARMAINE
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2005 Chevy Lumina 138000 miles

MY CAR IDELES UP VERY HIGH WHEN I START IT UP IN THE MORNINGS, AND WHEN WHEN I GIVE IT A LITTLE GAS WHILE STILL IN PARK IT STILLS DOES THE SAME ,BUT WHEN I TAKE OFF IT JERKS A LITTLE HARD BUT RUNS FINE AFTER THAT. ALSO SOMETIMES AS I DRIVE IT WILL SORT OF HESITASTE LIKE A COUPLE OF JERKS THEN IT WILL RIDE SMOOTH FOR A WHILE UNTIL IT DOES IT AGAIN, SOME DAYS IT DOES THIS AND SOME DAY IT WANT. PLEASE HELP ME. THANKS AND GOD BLESS EACH AND EVERYONE OF YOU GUYS. ONE MORE THING WHERE SHOULD MY TEMP HAND BE IT STAYS ON THE HALF MARK.
Mar 5, 2009 at 12:51 PM
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JACOBANDNICKOLAS
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Hi:
Has the check engine light come on? Also, is the middle of the temp gauge in the safe range?

Joe
Mar 5, 2009 at 5:19 PM
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JAMES W.
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It sounds like your "idle air control" IAC unit may be defective or just need cleaning. If you have, or have had, a check engine light while driving. The computer may have picked up a problem with this unit. The jerking, when you put the car in gear, is probably from the engine idling too fast.
If your temp gauge is holding in the middle of the scale on the gauge, that's 170 to 190 degrees and that is where you want it to run. Hope this helps.
Mar 5, 2009 at 5:23 PM
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