The problem with difficult refueling is a different issue. Doing this at a half-dozen fill-ups or so can eventually fill the vapor separator and force liquid fuel into the canister, which is designed to capture and store fuel vapors until the engine is started and they are drawn into the induction system and burned. It’s called “fuel packing” and involves continuing to add fuel after the automatic shutoff has clicked on the nozzle. It is possible to fill the charcoal canister with fuel by regularly overfilling the tank. Is it possible to damage the charcoal filter by putting in too much gas? It sounds like the vapor venting is restricted. I have a feeling it has to do with the EVAP system. At best, I need to fill it painfully slowly. The problem might also show up after a sudden stop or after driving on a rough road.My wife’s 2005 Dodge Grand Caravan will not let us add gas to it. If I'm right about the problem being contamination in the tank, then I'd also expect it to go away after the foreign materials have had some time to settle. If the problem is water leaking into the tank then you may notice it getting worse when there is rain, or maybe even heavy dew in the morning. ![]() If the problem is condensation, then keeping the tank full will help (and the problem should be worse during the humid months). I don't think Sea Foam would hurt, but it wouldn't address the water problem, so I don't think it would help either. ![]() If it is water a fuel dryer, such as Heet would probably help. If the problem is common in these vans, it seems likely that it would be related to water – either condensation or possibly water getting into the tank somehow. What seems more likely to me is that there is contamination in your fuel tank that gets stirred up when fuel is added. The pump isn't likely to "know" that you've filled up.
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