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Car Forum / Nissan / Nissan Z Cars / February 20051983 280 ZX NT : Whirring Fuel Pump
I've had this car for a long time, and it's been great. However, there's been an annoyance; the fuel pump makes a loud whirring or whining sound. I figured that was one of the Z's quirks, until I rode in a friend's Z (same year) and I could not hear his fuel pump. It must not be something wrong with the pump, since I've used it as my primary car for years with no problem, but I was wondering if anyone here is familiar with this situation. My 1983 2+2 ( Australian version... we never got the Turbo ) is quiet as....so it must be that yours is starting to develop a problem.... > I've had this car for a long time, and it's been great. However, > there's been an annoyance; the fuel pump makes a loud whirring or [quoted text clipped - 3 lines] > primary car for years with no problem, but I was wondering if anyone > here is familiar with this situation. > I've had this car for a long time, and it's been great. However, > there's been an annoyance; the fuel pump makes a loud whirring or > whining sound. Take the large inlet hose off the pump, pull out and clean the mesh screen then reinstall it.  SignatureSteve http://www.atlantaracing.com >> I've had this car for a long time, and it's been great. However, >> there's been an annoyance; the fuel pump makes a loud whirring or >> whining sound. > >Take the large inlet hose off the pump, pull out and clean the mesh screen >then reinstall it. Thanks for the response, Steve. As I mentioned before, I've been driving this car for seven years with no problems (aside from replacing injectors and under-hood fuel lines). Correct me if I'm wrong, but I don't figure that an obstructed screen in the main fuel line would keep feeding fuel for that long without the blockage worsening over time, or even burning out the pump itself. > Correct me if I'm wrong, but I don't figure that an obstructed > screen in the main fuel line would keep feeding fuel for that long > without the blockage worsening over time, or even burning out the pump > itself. 99% of the time when the pump is noisy, that's the problem. I guess you could be the 1% that isn't? Sorry I offered this simple solution, go buy a new pump. SignatureSteve http://www.atlantaracing.com >> Correct me if I'm wrong, but I don't figure that an obstructed >> screen in the main fuel line would keep feeding fuel for that long [quoted text clipped - 5 lines] > >Sorry I offered this simple solution, go buy a new pump. So, you then offer an even simpler solution. :) That's where I figured I was, so at least I'm no worse off than when I started. At any rate, I appreciate your willingness to help, Steve. >>Sorry I offered this simple solution, go buy a new pump. > > So, you then offer an even simpler solution. :) > That's where I figured I was, so at least I'm no worse off than when I > started. Just out $300 when a free inlet screen cleaning would have probably fixed it? Or did you go buy a cheapo pump that WILL be the problem soon? > At any rate, I appreciate your willingness to help, Steve. And your unwillingness to listen to advice. If you "KNEW" what was wrong and are going to ignore any advice, WTF did you even ask the question? SignatureSteve http://www.atlantaracing.com >> At any rate, I appreciate your willingness to help, Steve. > >And your unwillingness to listen to advice. > >If you "KNEW" what was wrong and are going to ignore any advice, WTF did you >even ask the question? Steve, I showed you nothing but respect and gratitude. Why are you stepping to me with hostility and profanity? In case you gave a crap about helping, you are ignoring the facts that I stated in the initial post. It's just common sense that a fuel filter that's so clogged that it would make a fuel pump whine is going to either make the car run erratically from unreliable flow of fuel, or it's going to make the fuel pump itself burn out in short order from working too hard. A situation like that is definitely not going to make a car run like a champ for 7 and a half years and 50k miles. Yes, I did mention that the pump was whirring when I bought the thing, 7 and a half years and 50 thousand miles ago. If you were unwilling or unable to provide any alternate diagnoses, then just say "You're on your own." There is not one good reason to cop an attitude in this situation. >Steve, I showed you nothing but respect ??? by saying you know (from your vast experience?) that this couldn't be the problem when it's by far the most likely. > It's just common sense that a fuel > filter Who said "filter"? I said the pump =inlet= screen. > that's so clogged that it would make a fuel pump whine is going > to either make the car run erratically from unreliable flow of fuel, No it isn't, I've seen this HUNDREDS of times. > or it's going to make the fuel pump itself burn out in short order > from working too hard. Again that makes no sense. Why would it "burn it up? This is on the suction side of the pump. > A situation like that is definitely not going > to make a car run like a champ for 7 and a half years and 50k miles. Sure it can. > Yes, I did mention that the pump was whirring when I bought the thing, > 7 and a half years and 50 thousand miles ago. So what? > If you were unwilling or unable to provide any alternate diagnoses, > then just say "You're on your own." No, you're not willing to spend 5 minutes to check the most obvious solution, it's easier just to "think" that this can't be it sitting at a computer screen. SignatureSteve http://www.atlantaracing.com If it is making noise the pump is going out. If you consistantly run a fuel injected engine low on fuel, under a quarter of a tank, the pump will burn up eventually. This is on the kind where the pump is in the tank. The fuel cools the pump as it is submerged in the gasoline. You can try to remove it and clean the screen. But, the pump, in my opinion, is on its way out. Also, unless you get a new o-ring with it do not get the old one wet with fuel as it will expand and you will never get it back in place. Also, this is a great time to replace all the hoses if you are going to remove the pump. > I've had this car for a long time, and it's been great. However, > there's been an annoyance; the fuel pump makes a loud whirring or [quoted text clipped - 3 lines] > primary car for years with no problem, but I was wondering if anyone > here is familiar with this situation. > If it is making noise the pump is going out. If you consistantly run a > fuel injected engine low on fuel, under a quarter of a tank, the pump > will burn up eventually. This is on the kind where the pump is in the > tank. The pump isn't in the tank... SignatureSteve http://www.atlantaracing.com If the pump is outside of the tank and it is making noise I wouldd then check the resistance on the circuit to see if it is out of range. Also, it the bracket and dampner that holds it is screwed up it will also make noise. I have done a couple of old T Bird super coups that had that problem. >>If it is making noise the pump is going out. If you consistantly run a >>fuel injected engine low on fuel, under a quarter of a tank, the pump >>will burn up eventually. This is on the kind where the pump is in the >>tank. > > The pump isn't in the tank... > If the pump is outside of the tank and it is making noise I wouldd then > check the resistance on the circuit to see if it is out of range. Or check what I've seen HUNDREDS of times, a parcially blocked inlet screen. Nah it's got to be something else.... SignatureSteve http://www.atlantaracing.com Yes, it could be the inlet screen. And, as old as the car is the screen might be disolving too. I have taken some out of Corvette's where it was a melted mass of junk. My neighbor does not even have a screen on his and what is left was floating around in the tank. Plugged up the works. >>If the pump is outside of the tank and it is making noise I wouldd then >>check the resistance on the circuit to see if it is out of range. > > Or check what I've seen HUNDREDS of times, a parcially blocked inlet screen. > > Nah it's got to be something else.... > Yes, it could be the inlet screen. And, as old as the car is the screen > might be disolving too. I have taken some out of Corvette's where it > was a melted mass of junk. My neighbor does not even have a screen on > his and what is left was floating around in the tank. Plugged up the > works. What I'm talking about is there is a small metal screen inside the INLET fitting on the pump itself. It takes 5 minutes to take this out and clean it and 99% of the time that's all that's wrong. SignatureSteve http://www.atlantaracing.com >What I'm talking about is there is a small metal screen inside the INLET >fitting on the pump itself. It takes 5 minutes to take this out and clean >it and 99% of the time that's all that's wrong. Just for the record, I AM going to follow your advice, Steve. No hard feelings, I hope. |
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