Replacing Noisy LH Fuel Pump
Thread Starter
Racer
Joined: Aug 2008
Posts: 474
Likes: 33
Replacing Noisy LH Fuel Pump
I've got a 97 with a noisy fuel pump and am looking into replacing with the redesigned one from a 99.
My questions are:
1) Is it worth doing or is there still an annoying hum with the new design?
2) Would it be easier to a)buy a replacement tank w/pump or b)just replace the pump?
Thanks
My questions are:
1) Is it worth doing or is there still an annoying hum with the new design?
2) Would it be easier to a)buy a replacement tank w/pump or b)just replace the pump?
Thanks
Pro
Joined: Oct 2008
Posts: 510
Likes: 0
From: South Carolina
I've got a 2002 that just started getting the noisy fuel pump at 64K miles. If the fuel pump has been redesigned, then it hasn't been done very well.
I've heard there's a service bulletin that adds some blanket or something around the pump to muffle the sound. I'm not sure how much it cost or how much of a pain it is to install compared to just doing a fuel pump replacement.
I've heard there's a service bulletin that adds some blanket or something around the pump to muffle the sound. I'm not sure how much it cost or how much of a pain it is to install compared to just doing a fuel pump replacement.
CF Community Team
Joined: Oct 2004
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From: Cape Cod, Mass.
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There is a fuel tank insulator pad GM part # 12493728. GM service bulletin 99-06-04-052 outlines the installation procedure.
This question was asked in the Feb issue of Corvette Fever. The above is most of the response.
I would not spend the money on a new fuel pump. Personally I would just turn the radio up. But the above "solution" may lessen the sound.
This question was asked in the Feb issue of Corvette Fever. The above is most of the response.
I would not spend the money on a new fuel pump. Personally I would just turn the radio up. But the above "solution" may lessen the sound.
Thread Starter
Racer
Joined: Aug 2008
Posts: 474
Likes: 33
I've got a 2002 that just started getting the noisy fuel pump at 64K miles. If the fuel pump has been redesigned, then it hasn't been done very well.
I've heard there's a service bulletin that adds some blanket or something around the pump to muffle the sound. I'm not sure how much it cost or how much of a pain it is to install compared to just doing a fuel pump replacement.
I've heard there's a service bulletin that adds some blanket or something around the pump to muffle the sound. I'm not sure how much it cost or how much of a pain it is to install compared to just doing a fuel pump replacement.
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
The redesigned fuel pump is much less noisy and the change is worthwhile. There was nothing wrong with the noisy pump other than it had been previously used in another car where the pump was located at the back of the vehicle and wasn't heard in the cabin. In the C5 the pump was located a few inches from the driver with a thin metal sheet separating the two and made a lot of noise. I had the one on my 97 replaced under warranty sometime during 1999.
I don't know exactly when the redesigned pump hit production during the 99 model run but I would make sure you are actually getting one. Since 99 production started in June/July 98 maybe early production cars did not get it.
Bill
I don't know exactly when the redesigned pump hit production during the 99 model run but I would make sure you are actually getting one. Since 99 production started in June/July 98 maybe early production cars did not get it.
Bill
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
I've got a 2002 that just started getting the noisy fuel pump at 64K miles. If the fuel pump has been redesigned, then it hasn't been done very well.
I've heard there's a service bulletin that adds some blanket or something around the pump to muffle the sound. I'm not sure how much it cost or how much of a pain it is to install compared to just doing a fuel pump replacement.
I've heard there's a service bulletin that adds some blanket or something around the pump to muffle the sound. I'm not sure how much it cost or how much of a pain it is to install compared to just doing a fuel pump replacement.
Bill
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Pro
Joined: Oct 2008
Posts: 510
Likes: 0
From: South Carolina
Well, I'm not sure if this proves anything or not, but I couldn't get the fuel pump noise to come back. I changed out the filter anyway (which includes a new regulator) and I still have no pump noise after about 30 miles of driving at all speeds. If either the filter was clogged or the regulator was getting stuck, then I can see how the pump would start working harder to pump the fuel and make all that noise. The fact that it was intermittent makes me think its possible that the regulator was on the blink. At least I hope so.
I guess in 2003, they started incorporating the filter in the tank. From what I've read all new Vettes have to have the whole tank removed to change the filter. I'm lucky I just missed out on that hassel.
I guess in 2003, they started incorporating the filter in the tank. From what I've read all new Vettes have to have the whole tank removed to change the filter. I'm lucky I just missed out on that hassel.
6th Gear
Joined: Apr 2009
Posts: 6
Likes: 0
From: VINELAND NJ
I have a 99 with an annoying hum. The sound is coming from the rear of the car. Is there any way to silence the noise? I don't listen to the radio. I like to enjoy the sound of the car
without the hum
without the hum
Pro
Joined: Oct 2008
Posts: 510
Likes: 0
From: South Carolina
As far as an update on the filter I replaced, its been about 500 miles now and still no sign of fuel pump hum.
Drifting
Joined: Sep 2008
Posts: 1,273
Likes: 9
From: O'Fallon MO
Wish there was more info on this issue.
I have an 03 Z that has 45k on it. I have had this car since 1,400 miles. about 2years ago now I had my fuel pump losing pressure at WOT, it would drop down to about 25psi. Car was out of warranty by time, the mileage was about 27k, I luckily got it replaced under the GM goodwill program after being quoted $1,800 to replace it
I have the "new fuel system" that so intelligently moved the filter to inside the tank
I am now getting the Noisy Fuel Pump issue, it has been going on for about 3 months now. I have Kooks headers un catted and Borla Stingers and every time I come to a stop I can very much hear the pump. It is extremely annoying, I'm not having pressure issues or anything, just the damn high pitch whine from the pump.
I'm sure that the replacement pump was the "New Design".
I noticed that the noise will not be present if the fuel gauge is 3/4 or higher, and 1/4 or lower, but very much there if between 1/4 and 3/4.
What can be done about this?
Can the pump be fixed?
I don't feel that the "insulation" fix will solve this for me.
I have an 03 Z that has 45k on it. I have had this car since 1,400 miles. about 2years ago now I had my fuel pump losing pressure at WOT, it would drop down to about 25psi. Car was out of warranty by time, the mileage was about 27k, I luckily got it replaced under the GM goodwill program after being quoted $1,800 to replace it
I have the "new fuel system" that so intelligently moved the filter to inside the tank
I am now getting the Noisy Fuel Pump issue, it has been going on for about 3 months now. I have Kooks headers un catted and Borla Stingers and every time I come to a stop I can very much hear the pump. It is extremely annoying, I'm not having pressure issues or anything, just the damn high pitch whine from the pump.
I'm sure that the replacement pump was the "New Design".
I noticed that the noise will not be present if the fuel gauge is 3/4 or higher, and 1/4 or lower, but very much there if between 1/4 and 3/4.
What can be done about this?
Can the pump be fixed?
I don't feel that the "insulation" fix will solve this for me.
Team Owner
Joined: May 2001
Posts: 25,058
Likes: 1,265
From: Virginia
St. Jude Donor '11
Wish there was more info on this issue.
I have an 03 Z that has 45k on it. I have had this car since 1,400 miles. about 2years ago now I had my fuel pump losing pressure at WOT, it would drop down to about 25psi. Car was out of warranty by time, the mileage was about 27k, I luckily got it replaced under the GM goodwill program after being quoted $1,800 to replace it
I have the "new fuel system" that so intelligently moved the filter to inside the tank
I am now getting the Noisy Fuel Pump issue, it has been going on for about 3 months now. I have Kooks headers un catted and Borla Stingers and every time I come to a stop I can very much hear the pump. It is extremely annoying, I'm not having pressure issues or anything, just the damn high pitch whine from the pump.
I'm sure that the replacement pump was the "New Design".
I noticed that the noise will not be present if the fuel gauge is 3/4 or higher, and 1/4 or lower, but very much there if between 1/4 and 3/4.
What can be done about this?
Can the pump be fixed?
I don't feel that the "insulation" fix will solve this for me.
I have an 03 Z that has 45k on it. I have had this car since 1,400 miles. about 2years ago now I had my fuel pump losing pressure at WOT, it would drop down to about 25psi. Car was out of warranty by time, the mileage was about 27k, I luckily got it replaced under the GM goodwill program after being quoted $1,800 to replace it
I have the "new fuel system" that so intelligently moved the filter to inside the tank
I am now getting the Noisy Fuel Pump issue, it has been going on for about 3 months now. I have Kooks headers un catted and Borla Stingers and every time I come to a stop I can very much hear the pump. It is extremely annoying, I'm not having pressure issues or anything, just the damn high pitch whine from the pump.
I'm sure that the replacement pump was the "New Design".
I noticed that the noise will not be present if the fuel gauge is 3/4 or higher, and 1/4 or lower, but very much there if between 1/4 and 3/4.
What can be done about this?
Can the pump be fixed?
I don't feel that the "insulation" fix will solve this for me.
