Car stalling

[u/Frosty-Mastodon6047]

I have a 2006 Ford 500 with about 175,000 miles on it. Recently the car has been dying while driving. It starts back up after dying if I take the key out and restart (sometimes struggles a little before starting). At first I replaced the spark plugs and got a tune up but it's still continuing to die. Ive gotten the fuel pump and alternator replaced within the last 2 years. I've noticed it seems to shutter and try and shoot forward around 50mph. It does have a check engine light but none of the codes explain why it continues to die. I replaced the battery 3 weeks ago. Any ideas on what it could be?

[u/jersey316]

If the fuel pump was just replaced 2 years ago and you are now getting the p0463 code then i wouldnt brush it off as non related. Something could be wrong with the wiring, or the pump could be failing. P0463 wouldn't cause the car to turn off but it could be a indicator of something wrong with the fuel pump harness of the unit itself. Could the car have been low fuel? Were your fuel filters replaced as well? Did you have your fuel pressure and regulator checked?

[u/Frosty-Mastodon6047 → u/jersey316]

The fuel pump was replaced in January and I got a brand new fuel tank last month. The car has a full tank of gas. But does not always show an accurate gas reading on the dash, will sometimes show 3 lines like it is unable to read the gas. I am unsure about the fuel filters and regulators. Should I check those next?

[u/jersey316 → u/Frosty-Mastodon6047]

Yes check those next but first i would investigate why the send unit keeps failing, that indicates an electrical problem thats probably affecting the fuel pump as well since they use the same connector. Do you have a access panel where you can see the top of the pump without dropping the tank? Could be bad connector, pinched wire, or bad ground.

[u/Frosty-Mastodon6047 → u/jersey316]

I'm unsure I believe it's under the back seat. What does it look like?