Faulty Wiring Harness In Fuel Pump...Please Read

[sittin_sideways]

I just wanted to share this and get any feedback to see if this has occured before with anyone.

I dropped the fuel tank on my '95 STS, and took out the fuel pump. Upon visually inspecting the sending unit I was left in shock. The wiring harness had exposed, melted wires and the harness itself had literally melted. I am very very lucky. If it would have sparked I wouldn't be sitting here writing this.

Has anyone else ever seen or experienced this problem?

[Ranger]

Yeah, I have has a burnt connection inside the pump on a Blazer years ago. It's not as dangerous as you think. There is not a lot of available O2 in the tank.

[ewill3rd]

Ranger is right, and it is not uncommon.
It is worse on the trucks.
What typically happens is that the pump pulls too much current because of age or a bad filter. This causes the wires to overheat and it can melt the insulation off.
I have seen them melt directly to eachother, power and ground.
They usually come in blowing fuel pump fuses when they are like that.

As Ranger said, the air:fuel ratio is usually way too far out of range for ignition. Some older Chryslers were really bad about it.
You have to have fuel and oxygen for it to ignite. Don't freak out, you were never in any real danger. Good thing you got it fixed though or you would have been in danger of walking somewhere.

[caddydaddy]

Originally Posted by ewill3rd

As Ranger said, the air:fuel ratio is usually way too far out of range for ignition.
You have to have fuel and oxygen for it to ignite. Don't freak out, you were never in any real danger.

Do a search for Lower Explosive Limits (LEL) and Upper Explosive Limits (UEL), and you will see what they meant by how you weren't in any danger of an explosion.

[internetauto]

a fuel filter in time saves mine.