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Really weird stumbling problem

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  #41  
Old 10-11-2011 | 06:59 PM
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Originally Posted by HeyYou
Have you used carb or brake cleaner to check for vacuum leaks? (that's sure what it acts like....) if you don't find anything obvious, try capping off the lines that run to the reservoir under the cowl, and the heater controls.


I haven't tried that yet as I'm scared to start a fire, especially since the engine seems to have to be good and hot for it to happen.
 
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  #42  
Old 10-11-2011 | 07:06 PM
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what do you think the chances are the the brake booster diaphragm isn't sealing? I'm about 'reached' out..
 
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  #43  
Old 10-11-2011 | 07:58 PM
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Is it possible it's having some sort of misfire first, then the misfire causes the vacuum loss and the vacuum loss has nothing to do with the cause of the misfire? IMO falling vacuum wouldn't make it stumble, it would act as if the throttle was opened and would accelerate, those AFRs aren't nearly rich enough to make a warm engine stumble IMO.
 
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  #44  
Old 10-13-2011 | 08:19 PM
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A little update:

I removed all of the MSD ignition system components. Running the stock coil.

The stutter is not gone, but it is reduced. Something in the MSD box was amplifying the problem.
 
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  #45  
Old 10-23-2011 | 12:45 AM
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Never mind..
 
Last edited by jondakotaguy; 10-23-2011 at 01:34 AM.
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  #46  
Old 10-23-2011 | 03:33 AM
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Still fighting this one, as an update
 
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  #47  
Old 11-07-2011 | 08:07 PM
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Keep us posted!
 
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  #48  
Old 12-03-2011 | 02:29 PM
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HOws it going? Dont forget to update
 
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  #49  
Old 03-26-2012 | 03:22 PM
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Sooo.... Did you ever figure it out?
 
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  #50  
Old 03-26-2012 | 04:10 PM
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He did...

His second gen turned into a challenger srt8... That's one helluva mod, yo..
 
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