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Unread 12-09-2015, 09:23 AM   #1
sjordan1
Registered User
1990 YJ Wrangler 
 
Join Date: Dec 2015
Posts: 9
YJ Fuel Pump Noisy

Hello fellow Jeepers, I have a 1990 YJ, 2.5, 5-speed. When i turn the ignition on, I can hear the fuel pump turn on and prime up. After that, I can still hear it running and its kinda loud and aggravating. Is this something that i need to address or do i need to just get used to it?

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Unread 12-09-2015, 11:08 AM   #2
mizzle00
Registered User
1992 YJ Wrangler 
 
Join Date: Sep 2014
Location: Springfield, VA
Posts: 60
Quote:
Originally Posted by sjordan1 View Post
Hello fellow Jeepers, I have a 1990 YJ, 2.5, 5-speed. When i turn the ignition on, I can hear the fuel pump turn on and prime up. After that, I can still hear it running and its kinda loud and aggravating. Is this something that i need to address or do i need to just get used to it?
I have a 2.5l. After the prime, I cannot hear mine.

There are only two wires in the connector going into the fuel tank. I presume one is for the gauge, and the other is for the pump.

Sounds like some kind of ignition/computer problem. I've read of fuel pumps delaying the prime for a few seconds due to computer problem. If this logic holds true, then it's the computer that is responsible for sending the voltage to the pump to turn it on. As such, my guess would be that it's not turning that voltage off after the pump is primed.

I'm sure someone here can chime in with actual experience. If it were me, I'd look into fixing it.
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Unread 12-10-2015, 06:14 PM   #3
bruinjeeper
Registered User
1995 YJ Wrangler 
 
Join Date: Jun 2013
Location: New West, BC
Posts: 1,546
x2 on fixing it.

It's not normal. IMHO, anything thats not normal (which has to deal with actual function of the vehicle itself) should be delved into. They tend to manifest into bigger issues.

Yes, its the common man's advice. Common men, usually have common sense. Look into it deeper - that voltage should cut off after about 3 seconds.

You say its really loud and aggravating - anyway of taking a video/sound recording? How LOUD is LOUD? Never have heard or come across this issue, and it would be a big help to many of us who haven't had the issue you're experiencing. It would also help the local guru, Que.
__________________
Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
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Unread 12-11-2015, 12:24 PM   #4
tlctyz14
Registered User
1992 YJ Wrangler 
 
Join Date: Jun 2014
Location: Chula Vista, CA
Posts: 8
My loud humming was because the "new fuel pump" I had installed was faulty. Was covered under warranty and had it replaced. Sound went away.
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