Alright guys, I'm having an issue with my new truck. See sig for details. Every time I fill up with fuel directly afterwards if I hammer on it it runs poorly. I first noticed it after fueling then getting on a highway onramp. It seems to bog and run very slowly through the rpms. I'm not over filling it just when the pump kicks off. Then I can cycle the key several times and all is well again. What the hell!!! No lights or anything and it always clears up and runs fine until the next fill up. EVAP system? I'm clueless but I plan to take her into the ship this week and see what they say. Its only got 2700 miles on it so i'm wanting to get this resolved asap. Just wondering if anyone has heard of such an issue?


red

 

you have to drive it nice for at least 10 miles before you shut it off or go wot. you do NOT have wide open fueling after you put fuel in it.

the truck is going through a fuel relearn to adjust for ethanol content.

 

Every time you fill up? I thought it was just when you switch from alcohol to gas or back ....

 

hmm that makes sense.

 

I had that issue as well after filling it up thats why i dive a few miles to prevent that

 

every time you put more than 3 gallons in it. regardless of fuel type.

 

Wow, thanks! Good to know.

 

Never knew this, will have to remember to take it easy after fueling up

 

Andy, your truck won't try to calculate alcohol content because of the way it's tuned.

 

Its only an issue if you run ethanol. With GM's new retarded ethanol fuel correction system, WOT after going from 100% gas to 100% E85 without adjustment will blow **** up. Its basically untuned, so..