Justinlb Posted July 3, 2021 Share Posted July 3, 2021 I have a fuel leak from my pump coming from the square hole, im unsure of what it is used for. Its lot of fuel pumping out of it (leaving a puddle of gasoline on the ground and casing my engine to backfire).the pump isn't that old either and has worked flawlessly until this evening. What could possibly be the problem? Is the hole needed for something? Picture is for reference of the square hole (not my picture). It seems like all of the new parts I buy end up breaking or going bad before the original engine parts. Link to comment Share on other sites More sharing options...
Victor W Posted July 3, 2021 Share Posted July 3, 2021 Hate to say it but you pump is going bad. Mine leaked the same when the diaphragm started to deteriorate. I'd get a fresh rebuild or the kit to redo it soon. 1 Link to comment Share on other sites More sharing options...
JFranklin Posted July 3, 2021 Share Posted July 3, 2021 It probably wasn't intended to work with E-10 gasoline. Link to comment Share on other sites More sharing options...
Bloo Posted July 3, 2021 Share Posted July 3, 2021 Gas shouldn't be getting to that hole. The diaphragm is bad. The diaphragm on one I took apart was just a bunch of layers of cloth. No doubt it was originally doped with something, probably shellac based. The solvent for shellac is..... ethanol. With the shellac gone the gas was just pouring through the cloth. Check out Then N Now automotive for new ethanol-resistant internal parts. https://www.then-now-auto.com/ 2 Link to comment Share on other sites More sharing options...
Brooklyn Beer Posted July 3, 2021 Share Posted July 3, 2021 Simple rebuild. Typical E-gas issue. The new E resistant materials will fix it. 1 Link to comment Share on other sites More sharing options...
Brooklyn Beer Posted July 4, 2021 Share Posted July 4, 2021 Check your oil BTW and see if you have any cross contamination. On Mopars a leak that bad will contaminate the oil. 2 Link to comment Share on other sites More sharing options...
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