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Weird idle after wash

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Old 02-11-2007, 06:07 PM
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Default Weird idle after wash

I just spent all day washing, claying, and beginning the three step mcguire's process on my car but it got dark so I pulled into the garage for the night. I noticed that after I turned the engine over, my gauges all maxed out, returned to normal, and that my idle sounded funny - almost weak. I revved a bit and it sounded kind of wimpy.

In addition to this, I noticed some smog coming out of my tail pipes which never happens, even on cold days. What's the deal here? I'm thinking I may have gotten some water in the intake when I was cleaning the hood. What else could it be?
Old 02-11-2007, 06:23 PM
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Did you have the radio on most of the time? Trip reset to zero? If it's a '99 most likely low battery voltage.
Old 02-11-2007, 06:29 PM
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Haha yes, yes I did. Well crap. The radio was on for about... four hours. That was probably stupid of me. Does that explain my weak idle and smokey exhaust though?
Old 02-11-2007, 06:48 PM
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The gauge sweep/trip resetting is a '99 instrument cluster thing with low voltage. If the car started right up voltage probably was't low enough to cause the PCM to have to relearn idle or the smokey exhaust?????
Old 02-11-2007, 07:06 PM
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I dont get what you're saying. is that a question or a statement?
Old 02-11-2007, 07:52 PM
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Saying I don't know why you had the weak idle/smokey exhaust - unless the voltage was low enough it caused the PCM to reset causing the idle to have to be relearned. Don't know if the '99 gauge sweep means the PCM resets, but only time my gauges have ever done that is while loading a new tune in my car.
Old 02-11-2007, 08:20 PM
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well lame, how long does it take the PCM to relearn proper idle?




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