Leaky fuel pump.
July 27th, 2022, 10:18 AM
#1
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Location: Connellsville, Pa
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Leaky fuel pump.
Anybody ever come across a fuel pump that leaks around the bottom area? This is a new Delphi pump about 4 months old that we kept smelling gas fumes & I got to checking around & saw a small drip on the floor under the fuel pump. It would always evaporate pretty fast why I never noticed it before. I checked all the fittings & hose connections & the top of the pump was dry but the bottom half was wet & dripped a drop about every 10 seconds. I just took it off & will be replacing it with another Delphi pump tonight. Hope it was just a fluke thing & not a common Delphi problem.
July 27th, 2022, 11:25 AM
#3
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I have a Carter on my '71 350 cid. Make sure you have it torqued down correctly. Put a straight-edge both to the pump and the engine to ensure they're flat. Sometimes I notice they come with two gaskets, mine only had one. Is your pump a three line or two line pumper?
July 27th, 2022, 12:46 PM
#7
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Location: Ft. Wayne, IN
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The diaphragm in your pump has a leak, and it is running out of the vent hole on the bottom side of the pump (the top-side of the diaphragm is what pumps the fuel, the bottom side has to breathe through the vent hole). This is a common failure mode.
Last edited by JohnnyBs68S; July 27th, 2022 at 12:48 PM.
July 27th, 2022, 05:07 PM
#9
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I had two fail in the way JohnnyB mentioned. I think it is hit and miss on the replacements. I used to think the Carter's were ok, but then I saw some posts here having issues with them.
July 27th, 2022, 06:12 PM
#11
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I just did some reading of the fine print on the NAPA box.
This is actually a Carter fuel pump & is listed for $33.00 on line & on the store computer ,for some reason the salesman must have been in a good mood & sold it to me for $22.00
My old one was only 4 months old & was a Delphi. but I didnt buy it , the previous owner did & I didnt pester him to return it since a new one was so cheap.
This is actually a Carter fuel pump & is listed for $33.00 on line & on the store computer ,for some reason the salesman must have been in a good mood & sold it to me for $22.00
My old one was only 4 months old & was a Delphi. but I didnt buy it , the previous owner did & I didnt pester him to return it since a new one was so cheap.
July 27th, 2022, 09:30 PM
#12
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Location: central Indiana
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Might want to change the oil. If it was leaking fuel out the vent, then the diaphragm has a leak. It can leak into the engine just as easily as leaking out. At the minimum, pull the dipstick and smell the oil.
July 28th, 2022, 04:00 AM
#14
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July 29th, 2022, 04:33 AM
#16
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Location: Edmond, OK
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I had a mechanical fuel pump that pumped fuel into the crankcase. It did it so fast the oil dipstick would read high after a short drive in town. As I recall, it was a new parts store fuel pump too.🤔
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