Problem with gas filling, NOT charcoal canister

[laramik]

I recently purchased a 98 convertible GT for my daughter on Christmas. After I drained the tank I went to go fill it up and it took me nearly 20 minutes because the pump keep shutting off as if my evap canister was clogged. Took everything apart heading to the EVAP canister and the lines are clear as can be and I can easily blow through the charcoal canister. Also reconnected everything and blew directly through the vent tube that attaches to the tank and you could clearly feel the air coming through to the evap canister and put the purge. Only thing I can think of is that the fuel filler neck anti siphon check valve is somehow broken? The car only has 67,000 miles on it and not a speck of rust so I know it's not the neck being corroded. Any ideas on what this could be that I might be overlooking before I spend a hundred plus on a new fuel filler neck. Any ideas or help is much appreciated.

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[laramik]

Oh and if this should be posted under tech just lmk. Didn't quite see where in there would work.

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[Silver95bird]

I don't know why you would think the charcoal can would affect fill-up, but yes I'd start to wonder if the filler neck had some kind of debris in it that was messing with the check valve.

If you change it, buy a new seal where the filler neck goes into the fuel tank. My cars were 2/2 for those going bad. Don't have to do the job twice.

 

[laramik]

The gas tank vents through the evap canister is my understanding. If clogged, it will cause the same symptoms.

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[evilcw311]

My car doesn’t have charcoal lines. Hadn’t for years and it always filled up fine.

It’s an issue with your filler neck.


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