97 lumina gas tank "thumping sound" p0440 code

hey guy, well got a problem with my 1997 chevy lumina 3100 v6 118k miles the gas tank is doing a "thumping sound" like thump,thump,thump... and the service engine light is on. code P0440. no gas leaks or smells, car runs just fine, no noticable loss in mpg's. hell if i didnt live in a smog nazi state like ca....... i'd clear the code,say F it...but!!!! its NEVER failed to pass smog test. https://www.fixdapp.com/blog/p0440 i took a look under hood, no sme

I happened to remember that I "thought" that I "might" have saved a note from a post I had msde on 60deg V6.com Maybe 20 years ago... AND after all those years and PCs that there is one folder on rhis PC that I always put on a new/different machine... Here is a copy... I didn't test if the link is still active,,, it WAS a LONG time ago... Speaking of Dead Links I see 60DegreeV6.com is officially DEAD... That SUCKS... Besides this site 60deg was the ONLY form of social media I ever engaged in...