I recently purchased a 2003 Toyota Tacoma 2WD (4 cyl. 2.4L) automatic truck. It has 121,000 miles on it. I obviously have no idea how the person before me filled their tank (topping it off or not). I filled the gas tank a couple of times myself with no issues whatsoever. Then I used Sea Foam in the tank on a full tank (per the directions). Now when I go to fill it up-the pump cuts off every few seconds. I am not seeing any other symptoms--no gas smell, no reduced gas mileage, no hesitation, no CEL. I have read the discussions on-line and on this site regarding "slow fill" and charcoal/evaporation canisters. My question is this: is it likely that a canister would appear to be (and perform) absolutely fine and then go bad that suddenly? or.... Is it perhaps more likely that the Sea Foam cleaned some stuff out and somehow some debris or whatever got stuck in the breather line or a valve or something? It seems a bit coincidental to me that this started to happen right after I added the Sea Foam.
Any advice on what the problem may be and how to check for issues other than just replacing the charcoal canister (or whatever) would be greatly appreciated.
Thanks in advance.