splicing wires inside fuel tank for electric fuel pump on 94 f150 ,is this safe?

Question

per replacement instrutions useing butt connecters

Answer 1

Yes. DC power is completely different than AC power. Look at it factory is done this way, and has been for years.

Answer 2

I have the exact same problem only I allready changed the fuel pump a year ago! I found this on the web ; chances are it is one of 3 things, a bad fuel pump relay: if it is, it costs about $15 and is located in the "under the hood" fuse box. Look under the fuse box lid for location of the relay. #2 The oil pump pressure switch/sending unit: you can determine this by unplugging the wire connector to the sending unit and jumping the 2 end terminals together it is a 3 wire connector. If the fuel pump starts which is identified by a hum from the tank then it is most likely the oil press/sending unit.#3 The wire connector to the fuel pump itself could also be bad, but this is difficult too because you have to drop the fuel tank to get to it also. I know the oil pressure switch/sending unit sounds unrelated but the wiring circuit to the fuel pump has a branch that is routed through the oil sending unit and it can cause the pump not to operate if it goes bad. The oil sending unit (OSU) is in a difficult location in the back of the engine under the distributor and it takes a deep socket to remove. The fuel pump, if it is actually bad, is a big job especially if you have a full tank of gas. It is usually best to remove the gas before trying to drop the fuel tank. Most tanks nowadays are difficult to get a siphon hose into. The fuel pump I bought cost $180 from an auto parts store and figure 2 or 3 hours of labor just depends on how good/quick they are. There are a few tricks to dropping the tank and there are some fuel line connector tools required but they are not expensive. If you do change the pump, you'll also need to change the fuel filter. After everything I said earlier, you may want to check that the fuel filter is not plugged up...it is a possibility, but I have never seen a plugged up fuel filter. I, of course, buy my gas at reputable places, but if you don't I guess it's reasonable to look at in addition to what I told you. Good Luck Hope this helps!

Answer 3

Most fuel pump replacements come with a new wire kit, and as long as the wires are insulated, it is no problem. Most of the kits that I have installed require using the OEM connector but replace the pins inside the connector. If you are actually spicing the wires, use heat shrink tubing around each wire and make sure you are using a "non-flame" heat source and away from the tank, and while you are at it, cover the opening of the tank if you are within a couple of feet while using the heat gun.

Answer 4

Using the supplied butt connectors is not the best route. It would be better to solder and heatshrink the connections, as vibration can fatigue a butt crimp connection and it can fail (though it probably wont).

I've done my share of fuel pumps, I just solder all the connections (when needed).

Answer 5

Listening to an idiot who thinks DC power is completely different than AC power would definitely not be safe.
Your gas tank is a basic fuel/air bomb. All you need is a spark to complete it. If you'd bet your life on your splice being perfect, go ahead.

Answer 6

First of all have you lost your mind.
good news for you though. You have to take out the electric fuel pump before you can do any re-wiring .

Answer 7

as long as you insulate them with solid conections and insulators it should be ok

Answer 8

Sparks + fuel = explosion. No, I do not think it is sfe for you to do that.