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  #11  
Old 09-30-2010, 02:24 PM
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ok... on the drive in this morning, the truck ran much better than it did before I had the RPM drop problem, not to mention, no RPM drop!

There is a new problem however...

When the truck is in gear, and I am accelerating, there is a "sucking" sound, it sounds like there is a disconnected hose or something. but I cant find any loose hoses.

Is there a gasket between the IAC and the TB that I missed? there was/is a rubber O-ring on the IAC that I made sure was there when I put it in, but I didnt notice any other gaskets.

Additionally, I pulled the air filter and replaced it... and after doing that, I wonder if the previous owner ever did ANY maintenance on this truck. So I now know I need to replace the diff fluids and tranny fluid... but thats a different thread.

Any thoughts on the sucking noise? I cant imagine its normal... maybe the ECU learning the new IAC?
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  #12  
Old 09-30-2010, 02:36 PM
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The IAC is only sealed with the o-ring you mentioned. Check and make sure the housing is on the throttle body correctly and check for any disconnected vacuum lines.
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  #13  
Old 09-30-2010, 02:38 PM
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Quote:
Originally Posted by Topdown View Post
Thanks again for the advice and help. I am still curious on how to detect the blown gasket, but with any luck, I will have a little bit of time to figure that out and plan it to be fixed.
http://www.ramforumz.com/showthread....=plenum+gasket
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  #14  
Old 09-30-2010, 02:44 PM
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I will take a look at it again tonight when I get home. it felt fine when it went in/on.

I looked for loose vac hoses, but I will take a closer look at that tonight as well.

Were there multiple sizes of IAC from different years? I suppose its possible I have the IAC from the wrong year of truck, nothing against the guys at autozone, but anything can get packaged wrong.
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  #15  
Old 09-30-2010, 02:52 PM
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I'm pretty sure that all the IAC motors are the same for the BR/BE trucks.
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Old 09-30-2010, 02:59 PM
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ok, well if thats the case, then I have some investigating to do.

It doesnt quite seem like a vacuum leak since its not making any noise at idle and no noise when there is no load on the engine... we'll see I guess.
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  #17  
Old 03-04-2011, 04:59 PM
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I'm having similar problems but not that bad, could my IAC starting to fail?. my problem is similar where I'm driving and i let off the gas and it plum its below idle RPM and dies but doesn't do it as bad and i don't have a problem restarting or starting it.Think it just needs to be cleaned?
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  #18  
Old 03-04-2011, 05:51 PM
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Thats how mine started... ended up being the IAC that eventually failed. the truck always restarted, but died at every stoplight/stopsign.

Its a cheap part to replace, around 30.00, and to clean it you have to remove it completely anyway... IMO, worth replacing and not having to worry about it.
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  #19  
Old 03-04-2011, 07:19 PM
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Very true, ill go buy one tommorow and go ahead an look at my TPS and MAP sensor while im at it and make sure they are ok themselves. Thanks hopefully this fixes it
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  #20  
Old 03-04-2011, 09:18 PM
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best of luck! it fixed the problem for me immediately, so with any luck, it will for you as well.
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