new fuel pump makes a whistling noise?

[Pete M]

on day 2 of driving the truck around the block she's developed a fairly loud whistling-esque noise coming from under the back of the truck that's consistent no matter the rpms. 

 

2 steps forward, one step back...

[Pete M]

more info.  it's not the pump, it's the seal of the assembly to the tank.  I can wiggle it with my hand and change the pitch of the noise.  guess I gotta pull it out and swap out the seal.   

 

 

why can't fixed things stay fixed? 

[eaglescout526]

At least you’re not like me where I have to replace the front gasket on my XJs AX5 when I could’ve done that when I had it all apart had I known it was leaking there. 

[Pete M]

thank god I was too tired to drive over to the gas station and fill it up yesterday.    

[Pete M]

the plot thickens.  if I pull the return hose off the pump assembly and dump it straight into a gas can, there's no squealing. put it back on and the squealing comes back.  I'm very confused. 

[Eagle_SX4]

Maybe the return line is siting on the bottom of the tank not allowing it to return to the tank properly.

[Pete M]

guess I gotta pull it and see.   it's an aftermarket tank, so it doesn't have the little spot at the bottom that holds the assembly. 

[Eagle_SX4]

If you find that it is sitting on the bottom of the tank. You could drill some cross holes in the return line towards the bottom to make sure the gas gets out of the return line.

[Pete M]

it was indeed sitting on the bottom of the tank and causing the squeal.  

 

 

but the reason it was sitting at the bottom of the tank is that the product I bought has no method of firmly securing the pump.  literally the sock at the bottom was what held it in place. 

 

and I didn't notice this now blatantly obvious issue.    thankfully I'm still in my window for returns.

 

 

[Pete M]

I have great admiration for anyone that swaps a pump with the tank still in the truck.  it is challenging enough with the tank sitting on the pavement.  I think I'll do a writeup on this whole stupid experience. 

[eaglescout526]

The only challenge I remember having was getting the unit to sit right in the tank, otherwise the seal used to fight me when those suckers are new.