Bad fuel pump design on Dodge Charger/Challenger/Magnum & Chrysler 300

The wiring harness plug will overheat and melt the plastic of the pump connector, causing a few different problems

[@mrrr407]

Pain in the ass I had to deal with that fuel pump wiring 😭

[@suicidedream835]

How did u fix it my car has the same problem.

[@smileymagz9800]

So I don't use bottom off the now full pump just the top let me know

[@NukeNukemson]

If it’s just that top part that is cracked, you don’t have to change out the whole pump. That top part will separate from the bottom.

[@DreDaGreat1234]

Going through it right now

[@JoseSandoval-ic5xe]

Hi is what you changed the wiring harness inside the assembly? Sorry by any chance was your car running lean with this issue?

[@NukeNukemson]

It is the wiring harness pigtail on the car that has to be changed, but only after getting a replacement pump with that new reconfigured plug connector.

[@JoseSandoval-ic5xe]

@@NukeNukemson Thank you for your response did you by any chance had negative long term fuel trims when this happened?

[@NukeNukemson]

@JoseSandoval-ic5xe I did not have any fuel trim abnormalities with either Charger when these connection/cracking issues were happening with their fuel pump hats, and that makes sense because the actual pump module inside the assembly worked fine during all the trouble. However, before the leaky hat issue on the 2012, i did replace that primary fuel pump assembly in it due to the pump going weak and eventually failing. And when it first started acting up (getting weak), it threw a DTC for a lean fuel trim and illuminated the Check Engine Light. It got me home that night, but then failed to start the next morning IIRC, at which point I diagnosed it and then replaced it.

[@NukeNukemson]

Actually, the more I think back, the more I believe it continued to run for a while after the lean DTC and CEL, but I knew it was on the way out and so did the replacement within a few days when I had the chance to do the work

[@NukeNukemson]

FYI: a lean fuel trim issue does not always mean the primary pump assembly (or the auxiliary sending unit on passenger side) is going bad. Many times it does mean one or the other needs to be replaced, but it could also just be an obstructed or partially clogged fuel filter/sock inside the primary pump assembly’s basket. Those little socks aren’t considered a serviceable item, so a complete pump assembly replacement would be the official repair for a clogged one, but I think I would try manually cleaning the debris off it first to see if that was all that was needed if I found mine to be severely clogged upon inspection