Quick question.. I installed my 255 fuel pump today. Started the car, let it idle. Everything seemed fine. I drove the car for 20 mins and it drove fine also. But I don't hear the "whine" everyone talks about.

Does this mean I did something wrong? And would my car even run if it was installed wrong?

 

If your car started, you didn't do anything wrong. I've had my 255 in the evo for 8 years and haven't heard any noise from it at all.

 

It will whine when it gets more use out of it and/or really hot outside

 

Yeah, mine never really whines either. All the other noises would probably drown it out anyway.

 

Hot outside temperatures coupled with extended driving and/or low fuel will trigger the whine.

 

I'd say your lucky and got a good one

 

 

i noticed mine whines EXTREMELY loud after long drives, it also caused me to run a little leaner than usual. but on a normal drive its pretty quiet.

 

Even on long drives stop and top the tank off frequently. At any rate don'y allow the tank to get below half full. The pump runs cooler with a full tank. Of course if yours is whining after long operating periods, then this may be a sign that the pump itself may be getting weak and its time for you to get a new one. Always carry your original pump in the glovebox as a spare just in case.... Especially on long drives.

 

my pump is new, put it in about 4k miles ago. didnt know that i had to stay above half a tank though.,

 

I have had my walbro for over 5yrs and never had a problem with driving it until tank gets to e. It whines but I have to really tune into it to hear it. Its only really noticeable with back seat out.

 

Hot temperatures, low fuel, high load/boost will all cause the pump to work harder and make more noise. If you have all of the interior panels/carpet/seats it will muffle the noise quite a bit. Those of us in gutted cars driving in hot weather on a track in full boost tend to hear it quite a bit more.

 

 

+1, good info!