The fuel pumps didn't make a peep until today when I started the car up on a normal day to go grab some gas. The car was around 1/2 tank and the whine is really noticeable. The pitch of the whine would change if I loaded the car up electrically.

Filled the car up with e85 and it went on a long drive to NJ seemed to have went away with a full tank. When I get back the car was around 1/2 tank again. Started the car up tonight to go run to the store and the whine is back.

Should I be worried? Replace the pumps? Typical walbro whine?

 

well is it dropping afr's? I mean honestly you can replace both for under $200 (given they are 255's) , so dont take a risk, 200$ and peace of mind or worry and god forbid few grand for a new motor if pump gives up on you.

 

Sounds like you're loosing a pump. It gets hot at half tank and starts whining.

 

Agreed. Replacing both of them this weekend.

 

if they are the walbro 255's then they are notorious for wining and it shouldnt be a problem. People call them winebro's its such a known thing. Maybe before dropping $$$ you should call up buschur and see what their techs have to say about it.

 

Walbros have a standard whine, but when they get really loud it's a good indication that they're going out.

 

Agree with biggies, the Walbros are known to whine. Make sure you have the pre-filters installed.

 

Here's a video:

 

Depending on how loud your car is mainly but my 255 I could here it outside the car with it running and it was brand new.