john in KY Posted November 26, 2017 Share Posted November 26, 2017 Wife noticed a wet spot under car last night. Turned out to be gasoline. I suspected filler tube. Just pulled all the covers and the filler tube, what I can see, appears not to be the problem. Fuel is dripping from right-front corner of the tank. Going to pull the rear seat thinking there is an inspection plate there for the fuel pump. I topped off the tank Friday. Don't yet know if that is part of the problem. Anyways, if the filler tube is not the problem, any ideas what else could be? Quote Link to comment Share on other sites More sharing options...
john in KY Posted November 26, 2017 Author Share Posted November 26, 2017 Removed the pump inspection plate and it appears the pump gasket is weeping fuel. Tank is not pressurized which puzzles me. Only thing I can think of is I overfilled the tank and the gasket is bad. Will let the car idle to burn off fuel and take it from there. Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted November 27, 2017 Share Posted November 27, 2017 maybe inspect for cracked plastic or leaking hoses? when you say 'top-off', are you continuing to fill after the pump handle clicks off? that can lead to problems. Sure, rounding up to the nearest 10 cents or 'maybe' 25 cents is unlikely to be an issue, but the carbon canister can flood if you or another driver fills to overflowing every time - then particles of carbon can get into the evap system leading to issues too. 1 Quote Link to comment Share on other sites More sharing options...
montana tom Posted November 27, 2017 Share Posted November 27, 2017 (edited) Yes, very bad idea to overfill past the pump click off. Evap systems can get really expensive to diagnose and repair ! Even if you are going past the click off ... there should be no leakage. As LT said look close for bad hose/ cracks/ loose pump bolts... something isn't rite ! Puddle in the morning is making me think your fuel line is draining backwards overnight ... Edited November 27, 2017 by montana tom Quote Link to comment Share on other sites More sharing options...
john in KY Posted November 27, 2017 Author Share Posted November 27, 2017 (edited) No, I don't overfill. The leak is either the pump gasket or one of the hose connecters. Disconnected the 2 hoses this morning, sort of dried the top of the pump and will wait to see if more fuel puddles up. Had a good-size stain under the car this morning which makes me think some sort of siphoning is going on. Leaning toward a bad gasket but can't figure out why it would leak around the gasket. Tank not pressurized/engine not running. "making me think your fuel line is draining backwards" How is this possible? Bad FPR? Edited November 27, 2017 by john in KY Quote Link to comment Share on other sites More sharing options...
montana tom Posted November 27, 2017 Share Posted November 27, 2017 The main feed line could drain back only (IF) you have a bad hose or cracked plastic directly on top of the tank. Quote Link to comment Share on other sites More sharing options...
john in KY Posted December 2, 2017 Author Share Posted December 2, 2017 (edited) New gasket arrived today. Original gasket looked good but by a stain on part of the pump flange I ascertained it was leaking there. Area with the stain, the plastic flange has a small crack...damn. I applied a dab of ultra gray, reassembled everything and currently still dry. Really really don't ever want to do this job again but if it starts to leak again, I'll bit the bullet and get a new pump. Edit: Did learn why the pump housing leaked when the rank was less than full and not pressurized. The pump assembly resides inside its own little tank/canister. A second pump pumps fuel into the fuel pump canister and then the main pump feeds the injectors. No matter how full or empty the main tank is, the fuel pump is always completely submerged in fuel. Edited December 2, 2017 by john in KY 2 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.