they do whine....but before mine started giving me problems...."intermittant power after warm up"
it was really loud...louder than iv ever heard....
i think it was the bearings in teh pump.....
i also notice when im lower than 1/2 a tank i hear the whine more....than when its full.....
makes sence....to me...
also after i changed my pump...and pump screen<"A MUST DO!!"
i noticed a good difference in power........
i got the truck with 136k on it......and never felt as responcive as it does now.......
pump/screen/filter....man what a difference.
