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Every time that I fill up my car and fire it up, the engine struggles to keep idle. It never dies. After I drive for 30 seconds, it stops. Is there a purge valve or something going out or dirty? My fuel pressure is good; to keep the idle, I've seen it go to 1000psi. Very strange. It never does it anywhere/any time else except at fillup.
 

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ghes stumble

 

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Make sure your gas cap is tight.
Try different gas company.
Clean your MAF sensor.

Make sure your Standback is tuned for your CAI. Try going back to a stock MAP and see if it still does it.

Also, when are you filling up? Try filling up when your tank is maybe 1/2 full rather than less than 1/4.
 
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