I think when a company is trying to get a contract to produce xxxx amount of pumps at xxxx price, they don't spend a ****load of time attempting to create the most quiet pump on the market. My anwer of "maybe that's just how they are" means, maybe these pumps are noisy... plain and simple. The last five Ford trucks we owned in the 84-97 vintage all had noisy pumps. (So did a Dodge.) Some from new, some after being replaced... didn't matter how many hours/miles were on them. And all pumps were installed correctly. (How do you make it touch metal in the tank and not realize this when you install it???) (And how is it that you need one pump to run off the other? Mine ran quite fine on only one pump for a few months.) It COULD be that some people are hearing different sounds. My wife does not hear the sound I refer to. My buddy's truck has the same sound. He does not call it a whine or a problem noise, he thinks that is the pump working. I hear a sound, but I am picky about my truck. Where I travel my vehicle could be the difference between life and death. You may stand near my truck and not hear a noise. Whatever. The fellow in the initial post was wondering about a noise from his pump. They make noise.

 

My 1990 F150 only has one tank and my fuel pump makes a loud buuuuuuurr when you first turn the key on and this is due to it priming. The constant weeeeeeee sound has always been there. Even after I replaced the pump when it went bad.. it still has the same sound when running. Fuel pressure is to spec so, it must be a characteristic of the pump. All seems fine.

Regards,
Dukernc

1999 F-350 CC Lariat Dually LB 7.3L, 6 speed, 4.10, Linex bed liner, 4" Magnaflow SST turboback exhaust w/ 5" tip

1990 F-150 XLT Lariat 4X4 SB 5.0 EFI, 3.55LS, Modified AOD w/auxiliary cooler, cat back, all around farm truck

 

Once again for those who don't know....I did not say that a specific year truck cannot run off of just one pump. I did say that most trucks...some trucks...will run two pumps in tandum of each other. Why do you ask? I don't build the darn things, I just know that when one pump shuts down the other pump more than likely will as well. You can't base my comment off of what has not happened to your truck, but if you are just looking for better understanding about it, I have no idea, and then I guess I must be in the same baot as you are with all the questions. Some of us just try to answer them from what we may have been through or just to the best of our ability. No harm, no foul!

Please be reminded that not everyone does there own mechanic work. and yes, like many old things parts loosen over time or can be installed wrong and rattle over time. Home many people do you know will drop there gas tank to install the pump that is located on the inside of the tank? Most of the newer cars and trucks are installing them in the tank. If it was my car/truck I would take it to someone else to do it. Fortunately people such as you, I must assume, and I, have the experience to replace what we need to without paying so much money for some other knuckle head to do it. Some things people will always have questions for!

 

my front one is louder than the back one, the front is aftermarket replacement and the rear is the factory one. i think some being louder than others is just the quality of the motor in the pumps, the factory ones obviously being a better one that one from autozone that may come from indonesia or taiwan. i can't hear mine going down the road only when standing beside it, if it still pumps gas then let it ride.

 

Now that you all mention it I just happened to be under my truck the other day and I was right by the fuel pump, and mine is the factory pump, and it was rattleing a little bit inside that I could hear, but nothing obvious from standing right beside it. I hope I don't have to deal with that for a while. Runs fine. I hope the rest of you still can get where you need to go and everything is all good. For some of you guys, I don't disagree with you that your pump does not make noise, it may, in fact mine does from what I've heard, just not as loud.

 

Here, let me help you expand your base of knowledge. First of all decide, most truck or some trucks? Some DIESEL trucks will utilize a lift pump and an injection pump. And yes, if the lift pump goes then most likely the injection pump will follow soon behind. On FORD gas trucks, in the 1987-1996 vintage this thread corresponds to, the fuel pumps, (on multiple tank trucks), can work independently of each other. Not just on MY truck, on all of ours. I was not asking how my truck could run on one pump literally... I was attempting to share your "sarcastic" answer to a ridiculous question. No harm, no foul!

Seriously, you should attempt to do some of your own work in order to learn more about your truck. How can you ascertain whether something is loose or rattling if you don't check it? And I would say most people who want to change their fuel pump would drop the tank, if they didn't know it is faster and easier to pull your box off to get at the pumps in the tanks. And it saves draining all the fuel out, unless you need to check or clean the inside of your tank. Anyhow point is, people come here to learn and share. What you share should be helpful and correct. If you don't know, ask. That's what the posts are for. And search past threads... most questions been covered again and again. I jumped on you for making a sarcastic response and claiming I had a ridiculous answer... when my answer was correct, (according to your later post.) There is no need for sarcasm here on this forum, please don't bring it and you won't recieve any. To learn, ask!

 

Well I think thats enough arguing than is needed. Simple statements need simple explainations. In this case if you took my answer as a sarcastic claim AGAINST you as if you had a ridiculous answer you are wrong. I don't think I said you had any ridiculous answers, and if my info is not helpful enough than just disregard it and go on. In my unfortunate discovery after posting I was underneath my truck...working on it...and heard what you all were talking about, but only after being under the truck, not standing beside it or in the cab. No harm done, just never had that problem, so I used what info I could find to help out the original postee. If in fact I am accused of wrong information, like you said, isn't that what we are all here for, to get the facts and try to determine the problem. Beleive me I came off strong because that is just my character. Some take it harsh, some just take it and move on. Now with this in mind I apologize if I offended you.
As for this comment! If you check any of my posts, I work plenty on my truck and ask plenty of questions in lue of answers to problems...don't assume that I don't know. I know plenty.
Thanks