Fuel gauge issue

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Jul 18, 2019 | 10:20 PM

kemsley21

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Fuel gauge issue

I have an early build 99 v10. I just replaced my fuel pump and assembly (installed a motocraft) my fuel gauge is reading empty now. It should be around half a tank. I drove it around the block a few times and the needle moved to about an 1/8th. Any ideas? Is it something that needs run time to calculate?

Jul 19, 2019 | 10:43 AM

alloro

Fleet Owner

Joined: Apr 2008

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From: 0,0,1

Try disconnecting the battery for a few minutes to allow the system to reset. If that doesn't solve the issue then you might need a new sender.

Jul 19, 2019 | 12:30 PM

kemsley21

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I had the battery disconnected the entire time of replacing the it. I bought the whole assembly, so it came with a new sender and pump. Could I have bought the wrong one?

Jul 19, 2019 | 02:43 PM

Djosbun

Fleet Mechanic

Joined: Oct 2017

Posts: 1,704

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From: Southwest Ohio

What was wrong with the old fuel pump? Same gas gauge issue? How’s the condition of the harness and connector?

— Dave

Jul 19, 2019 | 03:33 PM

kemsley21

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Since I've owned it, it's always kinda stumbled into a start up after sitting for awhile. Had my headgasket go out at 173k so I decided to just throw in a remaned engine. Start up symptoms didnt go away. I had my gf take it to work (works at ford) the guys there said my fuel pressure was bleeding off and that's what was causing the start up issue. About a week after that it started having a misfire. Threw a code for random misfire and cylinder 10 misfire. I thought it had to be caused by the bad/leaking pump.
This morning when I started it up, it still stumbled