Yesterday my car starting making a loud buzzing noise coming from the pump by the drivers side rear wheel. I replace the filter and the lines and the buzzing turned to a slightly audible with some cracks here and there. How long is this gonna last? I know this is the external pump that's making the noise and I don't mind replacing it, but I'm short on cash at the time.
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How long will a humming fuel pump last?
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Me and my friend have replaced both of our cars with Bosch fuel pumps and both of ours are humming again. I bought a $30 eBay pump I was using till my next pay check and that was humming only slightly louder then the Bosch so eBay might be your best bet bang for the buck to be honest, and i never put eBay parts in my car.
edit: Keep in mind I'm talking about the early external pumps
1992 M tech 2 Convertible - S50 Swap
1992 e34 Touring- S50 Swap
1992 325i-S50 Swap (SOLD)
1995 e36 M3 Mugello Red - S50 (SOLD)
1991 325i Convertible Laguna Green (SOLD)
1987 325i (SOLD);1992 M tech 2 Convertible (SOLD)
1988 325i Convertible Alpine White (SOLD)
1991 Brilliantrot Convertible 80k Miles (SOLD)
1992 325i Convertible Schwarz (SOLD)
1992 318i Convertible Project-Finished (SOLD)
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A bad internal pump will cause the external pump to suck when it is designed to push. This creates cavitation (look that up if you need to) and sounds like bubbling in the hose.
Def check the in tank before you spend any moneySeat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com
https://www.r3vlimited.com/board/sho...86#post4944786
Alice the Time Capsule
http://www.r3vlimited.com/board/showthread.php?t=360504
87 Zinno Cabrio barn find 98k and still smells like a barn. Build thread http://www.r3vlimited.com/board/show...20#post3455220
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If a new OE/OEM pump starts making noise soon after installation, there is a more fundamental problem. That could on a dual pump car be a bad in-tank transfer pump. And on those and single pump cars could be from an obstruction in the fuel supply/return lines, or a rusty tank.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL
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Have you ever spun something on a pencil and it spun freely for a second and then it sort of buzzed real quick and came to a dead stop almost instantly? That's exactly what's happening to the armature inside the worn out bushings in the motor. It's wobbling around violently and can't spin at full speed.
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i only had the late model high pressure in-tank pump, but mine buzzed for months before i got tired of it and swapped it out.
If they still sell it, you can find a Walboro 255 pump that is re-branded as Airtex e2448 at advance auto. I put that in my coupe about a year ago and no issues, plus IIRC it was under $70.
You'll have to take out you're in-line high pressure pump and put the Airtex in-tank.sigpic
1987 - 325i Convertible Delphin Auto [SOLD], 325i Convertible Delphin Manual [SOLD]
1989 - 325i Convertible Bronzit m30b35 swapped [SCRAPPED], 325i Sedan Alpine Auto[DD]
1991 - 325i Coupe Laguna Manual [Project], 535i Sedan Alpine [SCRAPPED]
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