Hello
I got a 2005 Grand Garavan with the 3.3 V-6. When I fill it with gas and leave it running it will start to idle rough. If I shut it off when filling it is hard starting but does restart. After started it will run rough for a while then suddenly cure itself. Then it will start fine until we refuel it again.Any help appreciated it has been doing this for a while now every fill up.
Thanks

 

have no one ever told u in your life not to fill the gas tank up with the engine is running? if not well here it is.
The pruge valve is sucking out gas vapors from the gas tank and burning it in the engine so when u open up the tank and startt o add gas it is changing the amount of vapor in the system thats why u get the crappy running for a bit.
So HELLO dont do that u also might set a check engine light by doing so.

 

OK Mr dodge tech.. Then how come when it is filling with it shut offit is hard to restart and also run like crapafter for a while. Why dont you answer the whole question instead of giving attitude.....

 

I did answer that question we need to fix u not the car try this step by step
turn car off fill gas in tank start car let us know if u have the same issues with that order fallowed.
IF u really want to know why y have hard start when u shut off the van while filling it up I will be more then glad to tell u.

The purge valve is sucking out gas vapors from the gas tank and burning it in the engine so when u open up the tank and start to add gas it is changing the amount of vapor in the system thats why u get the crappy running for a bit. The hard start is the computer foing off the last known amount of vapor in the system so it want to flow the amount of vapor it thinks it has with 1/2 a tank and instead it hasa full tank so it has to adj the fuel trim to correctly get teh 14.7 to 1 mixture.
ANy other questions.

 

Ok I am sorry for the attitude. Ok I did follow your order and the wan was hard to start and when it did start it ran rough. Then after a couple of start ups it was fine..

 

there is a computer update for rough idle after startup warm and running rough driving.

 

Thank You..

 

heehee that's why I love driving a diesel... fill 'er up while idling!

Of course I still enjoy the occassional Caravan jaunt as well.