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  #1  
Old 02-16-2006, 05:52 PM
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Fuel pump

Leaving for a trip tomorrow. I'll be going over the car ('99 C280) tonight to make sure everything is snug and dry. Just curious, do failing fuel pumps usually give a warning by getting noisy before they totally give up or do they fail silently sometimes? Mine isn't noisy but I don't know if that really means anything other than it just isn't noisy.
Thanks, Dan
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Old 02-16-2006, 06:35 PM
Ta ra ra boom de ay
 
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Do you suspect it? If so why?
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http://www.peachparts.com/shopforum/831807-post14.html
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Old 02-16-2006, 06:45 PM
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I agree. Why that particular component as opposed to something else (like a tire failure or a dead battery)?

Anyway, the fuel pump failed on my ML on a holiday weekend miles away from any reputable dealer. I will add that for six months, between the hard starts, stalls and occasional CE light, I chose to ignore ALL of the warnings and pressed on anyway. That was an $1100 mistake!

FWIW, fuel pumps generally don't fail abruptly...unless it's under a stress condition...like racing. I've had pumps fail on different cars, and all of them gave months of warnings before they "gave up the ghost"...
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Old 02-16-2006, 07:41 PM
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No problems. Just wondering if a silent fuel pump is a happy fuel pump.
Dan
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Old 02-17-2006, 10:00 AM
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Quote:
Originally Posted by forp
No problems. Just wondering if a silent fuel pump is a happy fuel pump.
Dan
Silent = happy...but that doesn't rule out the fuel pump relay for example...

Try not to worry about the laws of entropy for now...it will drive you nuts!
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Old 02-19-2006, 01:44 AM
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Good points.
Thanks for the replies.
Dan
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  #7  
Old 02-19-2006, 02:12 AM
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If I've decided the electric fuel pump is bad after veryfying that voltage is getting to it and the elect connections are tight i'll do one last test before replacing it. I hit it lightly with a hammer or pipe. That usually gets it going again for a while (like a starter or alternator on the fritz). It's a real crowd pleaser when you get a car running with a hammer!
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Old 02-19-2006, 10:43 AM
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I'd suggest a little preventitive care to possibly extend the life of the pump. Change your fuel filter to avoid an additional load on the pump as well as avoiding a common cause of fuel starvation - a clogged filter.
Tim
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