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  #1  
Old 05-13-2011, 01:43 PM
biggen06ram biggen06ram is offline
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Default Newbie Help - RPM question

So Ive noticed that when im at idle my rpms can go anywhere from 200-600.

Sometimes it will be a steady 500 or a steady 200, other times it will bob back and forth and back and forth. What could be causing this?

Also I just started my truck up in a parking lot, came to a stop sign and stalled when I came to a stop.


Truck is a ram 1500 06 5.7

Also I am not getting a CEL


Thanks in advance for any advice. I am lost.

I am also not getting any codes to check. Check engine light has never come on.

Plugs are still good. replaced not to long ago.

I have changed the plugs, EGR Valve, Cleaned the throttle body, new battery. Could my PCM possible be bad.

Anyone else having this problem. i have found a few on other sites but havent really been able to get an answer as to what to look for.
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Old 05-13-2011, 04:48 PM
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RedRam10 RedRam10 is offline
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I had that issue on my '06 with the 4.7 the gauge showed a fluctuation but the engine speed never varied. The dealer could never find anything to fix. As for the stalling issue I don't know where to point you. Hopefully someone will.
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Old 05-13-2011, 04:53 PM
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Old 05-13-2011, 06:07 PM
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Man, this is a tough one. My truck idles low but at a consistent RPM except for when the A/C or defroster is on. Then it varies but not by that much.

Having seen this problem posted by others, it could be an IAT sensor or the throttle body. A tech can check continuity for both those areas easily enough.

Without a code it's gonna be one of those things you may end up chasing a bit before you find the root cause.
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Old 05-13-2011, 06:13 PM
biggen06ram biggen06ram is offline
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WEll thanks for all the info. I have been chasing for a while with nothing helping. This week when it idles at 500 it is getting a little shaky like it wants to choke itself out. he dealerships over this way are horrible. All they want to do is sell you crap you dont need.
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Old 05-13-2011, 06:14 PM
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Dang...that sucks.

I assume you have cleaned the throttle body and made sure your EGR valve isn't failing, right?
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Old 05-16-2011, 09:09 AM
biggen06ram biggen06ram is offline
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Yea the throttle body was cleaned, EGR is good.

IT is not starting to idle rough at 500 rpm. It does drop to 200 still once in a while. I am at a lost.
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