1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

mid-location humming noise

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Old Jul 12, 2005 | 08:53 PM
  #1  
JDGJr85GSLSE's Avatar
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JDGJr
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From: 7400 ft plus jack stands
Question mid-location humming noise

Got tires put on today, and on the way home I was running about 40mph in 4th and started to hear a rather loud humming noise (not shrill, not very loud, but very obvious). Came to a stop and the sound lessened after 5-10 seconds. Started again and the sound returned, stopped and it lessened in 2 steps, both 5-10 seconds apart. Continued to make the sound for a few seconds even after the car was turned off.

Am I right that this is the fuel pump? Why would it start being noticable? is it starting to fail, and if so, how can I tell if it is time to replace it?

13b, stock.

thanks
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Old Jul 12, 2005 | 08:58 PM
  #2  
northwoods's Avatar
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From: Fryeburg Maine
For what its worth, you could locate the fuse for the fuel pump, pull it and see if the sound stops.
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Old Jul 12, 2005 | 09:26 PM
  #3  
1985_RX-7's Avatar
Stay away from my CT!!!
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From: Giddings, Texas
Ummm... well if it was from your speakers i could help.....(RCA cords near power cords)
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Old Jul 12, 2005 | 09:34 PM
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From: Ottawa, Soviet Canuckistan
Fuel Pump sounds about right.

Before you go thinking it's dead, change your fuel filter RIGHT NOW. That's step one. Eric's fuel pump could be heard from quite a distance away until he changed the filter.

Could save you the cost of a new pump!

Jon
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