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How to be absolutely sure it's a failing fuel pump?

TurboLove
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TurboLove Member

TurboLove

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I have a '08 CTT.  I have had experience with bad fuel pumps. I had a failed fuel pump (driver side, under rear seat) replaced at 40,600 miles.  (When it happened, the car barely got moving trying to accelerate after a red light.)   I'm at 57,000 miles now and just today when I got into the car and turned it on, I hear a noticeable but very faint din/whine.  I am having trouble trying to locate where it's coming from but it may be coming from the fuel pump that was replaced previously.  

 

The car drives and idles normal.  No warning lights on the dashboard.   So my question, could this be another fuel pump going bad?  If so, how long before it craps out?  What/where else should can I check to determine if the noise may not be the fuel pump?  Any suggestions, insights and experience are welcome!  Thanks so much for your help.

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JFP in PA Member

JFP in PA

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I have a '08 CTT.  I have had experience with bad fuel pumps. I had a failed fuel pump (driver side, under rear seat) replaced at 40,600 miles.  (When it happened, the car barely got moving trying to accelerate after a red light.)   I'm at 57,000 miles now and just today when I got into the car and turned it on, I hear a noticeable but very faint din/whine.  I am having trouble trying to locate where it's coming from but it may be coming from the fuel pump that was replaced previously.  

 

The car drives and idles normal.  No warning lights on the dashboard.   So my question, could this be another fuel pump going bad?  If so, how long before it craps out?  What/where else should can I check to determine if the noise may not be the fuel pump?  Any suggestions, insights and experience are welcome!  Thanks so much for your help.

 

I would suggest using something like an automotive stethoscope to try and  isolate the sound to make sure it is the pump.

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TurboLove Member

TurboLove

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Good suggestions.  Okay, let's just assume it's a bad fuel pump (I realize I don't know for sure,) am I driving on borrowed time and does this typically happen where the fuel pump starts to give off a consistent whine before it shuts down? again, it is so faint someone else may not recognize it, but as I drive it daily, I know the sounds inside my car.....

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JFP in PA Member

JFP in PA

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Good suggestions.  Okay, let's just assume it's a bad fuel pump (I realize I don't know for sure,) am I driving on borrowed time and does this typically happen where the fuel pump starts to give off a consistent whine before it shuts down? again, it is so faint someone else may not recognize it, but as I drive it daily, I know the sounds inside my car.....

 

More often, fuel pumps fail without any warning or noise, which is why I suggested trying to confirm the sound's source.  In the end, it may not be coming from the fuel pump.

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TurboLove Member

TurboLove

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Good suggestions.  Okay, let's just assume it's a bad fuel pump (I realize I don't know for sure,) am I driving on borrowed time and does this typically happen where the fuel pump starts to give off a consistent whine before it shuts down? again, it is so faint someone else may not recognize it, but as I drive it daily, I know the sounds inside my car.....

 

More often, fuel pumps fail without any warning or noise, which is why I suggested trying to confirm the sound's source.  In the end, it may not be coming from the fuel pump.

 

This is helpful.  I will continue to explore where the noise is coming from.  The hunt continues!

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