rough idle when going threw carwash

2004 CHEVROLET BLAZER
90,000 MILES • 6 CYL • 2WD • AUTOMATIC
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SIERP
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when i go threw a automatic carwash, my blazer starts ideling rough no lights come on but if you give it some gas "like up to 2000 rpm" it smooths out, the idle drops down a few hundred rpms never dies just runs rough, after i get done with the wash an pull out, it still runs rough for a block or two then it straightens up, i just had the intake gaskets changed because it was leaking antifreeze out the front of it, but the intake gaskets where an are good around the intake ports to the heads, this has me wondering whats wrong?
Jan 14, 2011 at 3:09 PM
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MMPRINCE4000
  • CAR REPAIR CONTRIBUTOR
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Most likely an electrical connection is getting wet. GM calls them weather-pak or Metric-pak and they should be sealed.

I would check the connections underneath for broken secondary locking tabs.
Jan 14, 2011 at 3:36 PM
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SIERP
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Under the vehicle, or the hood, can u give me a more exact place to look, an how can i check it, an repair it?
Jan 14, 2011 at 3:41 PM
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MMPRINCE4000
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Start under vehicle. Disconnect connector and check the silicon seal where wire comes in. These have a tab that locks the male and female sides, if tab is broke, then water can get in.
Jan 14, 2011 at 3:58 PM