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Rough Idle/Stumbling in General But Especially After Fill-Up

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24K views 31 replies 12 participants last post by  2019_FFS  
#30 ·
maydk65 said:
As part of the emissions control there is an evap purge/containment system attached to our tanks. It's purpose is contain vapors from our tanks. When we top off, we can get too much liquid in this system designed for vapors, which does not let the tank "breath" correctly. This breathing problem can cause the engine to stumble. After a time this purge valve can only take so much liquid and will quit working correctly. This is layman's terms. I am sure there is a more technical description for the issue
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I don't "top off".
 
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