280ZX (S130) Forums Dedicated to 79-83 ZCars

replacing fuel pump

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Old Jun 29, 2012 | 07:47 AM
  #1  
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replacing fuel pump

So my fuel pump just died. left me on the side of the road.

Since I'm going to be replacing the pump, and the filter (dont know when it was last replaced), my question is what is a fuel damper, and should I replace it also?
Old Jun 29, 2012 | 07:50 AM
  #2  
NismoPick's Avatar
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https://www.zdriver.com/forums/280zx...minated-35164/

Originally Posted by FricFrac
It prevents pulsations to the fuel system.


No, you don't need to replace it. Leave it alone.
Old Jun 29, 2012 | 04:11 PM
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rogerz's Avatar
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better off without
Old Jun 29, 2012 | 04:57 PM
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Originally Posted by rogerz
better off without
..how so?
Old Jun 30, 2012 | 08:13 PM
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I ran my '79 without one for the past 6 months, it was leaking fuel and I didn't feel like buying a new one at the time. I haven't noticed any performance/reliability downsides, but it definitely makes a difference in the noise coming from the fuel pump.

I actually just installed a new one today, the lack of pump noise is a relief. So if yours is working fine leave it in . . .

Inspecting/replacing all the rubber lines (and their clamps) under the car is definitely a good idea.
Old Jul 4, 2012 | 07:21 AM
  #6  
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No fuel now

I followed the direction in the haynes for fuel system reduction first of all.

I replaced both the fuel pump and filter, what came out of the filter was very red in color. no pretty.

Now, I have no fuel in the lines. I can not find a way to prime the fuel pump (not sure if its needed), also if i disconnect the lines coming to the pump, they do not have fuel in them.

Im out of ideas

how do I get fuel back into the lines
Old Jul 4, 2012 | 07:51 AM
  #7  
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Originally Posted by Pipsqueak
I followed the direction in the haynes for fuel system reduction first of all.

I replaced both the fuel pump and filter, what came out of the filter was very red in color. no pretty.

Now, I have no fuel in the lines. I can not find a way to prime the fuel pump (not sure if its needed), also if i disconnect the lines coming to the pump, they do not have fuel in them.

Im out of ideas

how do I get fuel back into the lines
Is your fuel pump going? If you turn your key on (before starting) you should hear your fuel pump priming for about 5 seconds and then it shuts off. If you are asking how to re pressurize your system, do that a couple times.
Old Jul 4, 2012 | 07:53 AM
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sounds like you got the wires switched.
Old Jul 4, 2012 | 08:28 AM
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Originally Posted by evandubya
sounds like you got the wires switched.
This
Old Jul 5, 2012 | 07:50 AM
  #10  
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Originally Posted by evandubya
sounds like you got the wires switched.
No, it was a bad fuel pump. I put the old one back on, and it fired up without issues.
Old Jul 5, 2012 | 08:18 AM
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The new one was bad or the old one? I thought the old one died?
Old Jul 5, 2012 | 09:00 AM
  #12  
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Originally Posted by NismoPick
The new one was bad or the old one? I thought the old one died?
It "died" and then came back to life after setting a few hours. This has happened to me once before on my burb, and is a fatal issues. when It gets over 100+ the pump will overheat after a while. If you let it set for between 15 minutes to a hour it works fine for a while.
Old Jul 7, 2012 | 06:08 PM
  #13  
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Originally Posted by evandubya
sounds like you got the wires switched.
It turns out this was the issue, but....

Since there were only two wires, and both were black, I marked one wire, and put the new one back on and made sure it was wired just like the old one. (at this point the old on is still on and working)

No gas. same problem as before.

so I decided to switch the wires ( nothing to lose at this point) and it fired up.

still working fine, but why?
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