8

Already having replaced 2 fuel pumps, both died.

Seems to have a problem in somewhere (alternator, battery, electricity) or I have no luck for fuel pumps.

The last one, last 6 months, before died completely, it start making a loud noises.

Vehicle: Dodge Charger SRT8 2009

On both fuel pump connectors there is a burned corner pin. No one in garage can tell me what is wrong with that.

fuel pump connector

Anyone got an idea what can it be ?

**** UPDATED QUESTION ****

So, after having tested an electricity, everything was fine, except that battery is about to die, but that's not a case. Alternator works fine, relay is fine, cable management should be fixed for the fuel pump, but that's just for a better future use.

The problem was: Somehow the fuel tank was extremely dirty, fuel pump engine died completely and the whole left part of fuel pump assembly was dirty, fuel pump filter was almost totally black from that dirt.

enter image description here enter image description here

Now I think to go back to the garage where they previously cleaned my fuel tank, to do it in a proper way. In a meanwhile I have to order a new fuel pump.

Question is: is that possible that a dirt could make a pin to be burned ?

anonymous2
  • 5,255
  • 3
  • 30
  • 59
aspirinemaga
  • 277
  • 1
  • 3
  • 10

3 Answers3

6

Voltage drop the ground side pin 4 with the car running. I'd suspect a poor ground is the cause.

You can also scope the power side by removing the fuse and putting a wire loop in place. Connect a low amp probe. Since the fuse is rated @ 20A you should expect to see 8-10A if it's drawing more amps than that suspect a short to ground or a bad ground or corrosion in a connector.

Ben
  • 10,686
  • 4
  • 23
  • 54
4

Dirt in the tank could definitely be the cause of the burned pin because the burned pin suggests that the pump was drawing a larger than normal current from that wire. The pump having to contend with dirt in the tank could mean it was having to work significantly harder than when pumping clean fuel which would be a very good reason for it to draw excessive amounts of electrical current. This additional current manifest in a significantly hotter temperature in the wiring and connectors and would explain the visual charring on the connector.

Steve Matthews
  • 23,464
  • 2
  • 41
  • 92
2

Another reason for burnt connectors could be from cargo or passengers sitting in the back seat on the driver's side. The weight on the seat cracks the plastic fuel pump cover and wiggles the connector causing the pins to heat up. If left too long, the pins will melt the plastic around them causing gas to leak through the connector. This happened to me twice, 5 months apart and at $165 per fuel pump I'm glad the second one was under warranty. I made an aluminum cover plate which solved the problem. Haven't had any issues for a year. Check out: https://www.fuelconnectorfire.com/

Mark Reichman
  • 21
  • 1