rpms dropping for no reason - Mustang Evolution

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Old 09-24-2012, 05:27 PM   #1
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is there a reason that when im in the middle of traffic that my rpms drop about ever 30 seconds to a minute 1998 convert v6
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Old 09-24-2012, 05:45 PM   #2
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If its an auto maybe its down shifting?
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Old 09-24-2012, 06:29 PM   #3
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it does it when im at a complete stop and autps dont realiy do it and my check engine light is also on
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Old 09-24-2012, 06:33 PM   #4
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Mine dose it when i have the brake down not when its in park 98 v6
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Old 09-24-2012, 06:33 PM   #5
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Some cars do that when they have a miss to them? You can sit there and watch the rpms drop and come back up driving or at idle, idk if thats what yours is doing but just a sugestion
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Old 09-24-2012, 06:50 PM   #6
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Could possibly be the idle air control valve. Also if you have a light on bring it to a shop and have them run it that could tell you what your problem is.( and I'm suprised no one mention to do that yet, when I have a light on and the car is acting up first thing I do is check the light)
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Old 09-24-2012, 07:07 PM   #7
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Quote:
Originally Posted by Dgerow12
Could possibly be the idle air control valve. Also if you have a light on bring it to a shop and have them run it that could tell you what your problem is.( and I'm suprised no one mention to do that yet, when I have a light on and the car is acting up first thing I do is check the light)
is it free
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Old 09-24-2012, 07:12 PM   #8
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Quote:
Originally Posted by Robbiemustang96

is it free
At autozone it's free, if you take it to a shop they may charge you a 50$ diagnostic fee also if you know someone with a handheld tuner you can check it that way also
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Old 09-24-2012, 11:57 PM   #9
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Autozone, ORileys, Advance...all do free testing
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