My 2000 Ram Sport, 5.9l 4X4 has a whirring noise coming from under the truck just behind the cab on the passenger side. My brother thinks it's the fuel pump, I say exhaust leak. It makes the noise in park and while driving. There aren't any codes coming up, and the MIL isn't lit. Any ideas?

 

We need more info lol

 

It doesn't sound like an electrical whir. It sounds like a small exhaust leak, but we are unable to locate one.

 

Plug te tail pipe for a sec and c I it get louder like with a old towl don't do it for too long tho

 

Okay. Tried that and no change. It almost sounds like the headlight alert when you turn the vehicle off with the lights on. Whirrrrrrrrrrrrrrrrrr.

 

Ok try putting your ear to the bottom of the tank and c if the noise gets louder if u don't want to stick you ear to it get a wrench and hold your hand at one end and stick the other to the tank and put your ear to your hand it magnifies the sound

 

Yep! That did it. Hopefully the fuel pump will last long enough til I can get one. $200+! Thanks for the help!

 

No big man it's probably the filter on the bottom of the pump not the pump itself it's starving for fuel drop the tank and clean the filter

 

Okay. Sounds easy enough. Thanks again.

 

I bought a new fuel pump from Napa for $220 and replaced it. The noise is gone! It took some work getting the gas tank out, and back in, but all in all wasn't bad. Thhanks for the help in diagnosing the problem! Back on the road!