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Fuel Pump ?

Lakotah

Well-known member
Joined
Nov 30, 2014
Messages
66
Location
Livermore, California
Corvette
1999 Pewter coupe
My 99 C-5 has just turned 81K miles and for quite a few miles, I don't know 30-50K or so, I've listened to what I've gathered is my fuel pump. It's never been really noisy, just something I can hear. Well lately (the past 3 or 4 hundred miles) a new sound has come up. It sounds to me like a ball bearing that's starting to go out. At least that's what I can best describe it as. I've taken off the serpentine belt and manually turned and pulled at anything that will turn and I can't feel or hear anything unusual. I hear this noise at idling or just a few RPM's above that. One thing I do notice though is I can slightly smell hot antifreeze but see no signs of a leak anywhere and the anti freeze level always seems OK. I have to mention I replaced the water pump a few thousand miles ago with a quality pump. So I don't know, do these GM fuel pumps continue to get noisier as the miles increase? Oh, and I have to mention that I never abuse the performance that's available under the hood so I can't say it could be from my abuse. Thanks for any help on this.
 

dadaroo

Gone but not forgotten
Joined
Nov 27, 2013
Messages
530
Location
Columbia, SC
Corvette
2001 Convertibla, Navy Blue and Light Oak
The next time you hear it pull over and get out and down on the ground and see if you hear anything from the pump location.


Mr. Sam
 

Lakotah

Well-known member
Joined
Nov 30, 2014
Messages
66
Location
Livermore, California
Corvette
1999 Pewter coupe
reply

The next time you hear it pull over and get out and down on the ground and see if you hear anything from the pump location.


Mr. Sam


Mr. Sam, I really can't hear much over the sound of the exhaust and engine from the underside. It appears like this new sound is coming through the dash board area rather than behind or under me. I stopped by and talked to my mechanic this afternoon about this. He mentioned what I might try is taking off the serpentine belt again then start the engine. I'll let you know.
 

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