Cheath16

Hello everyone, I have an '86 z28 and I have owned it for several years and just dealt with this problem and Im getting tired of it and want to fix it. The problem is that I bought it off of a guy that took the 305 out and put in a carb 350. When he did this he took off the charcoal canister. I am having a problem filling up the gas tank and have had this problem for 8 years and can't find anyone to fix it. The gas tank only fills up halfway and then stops because of the pressure buildup and I can't fill it up anymore. Ive checked all of the vents and they all seem to be working properly (meaning they're not clogged) I've spoken with many mechanics and nobody has a solution. There has to be someway to fix it. Thank y'all.

midias

Try rebuilding the vent valve

https://www.thirdgen.org/forums/hist...ent-valve.html

Cheath16

I've checked that and it works properly.