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Registered User
Join Date: Aug 2016
Posts: 1
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E46 fuel pump mystery
- 2001 e46 with 100k on fuel pump would not start after sitting for a few days. Power at pump (initial 2 sec (+11.5V) + power when cranking (9V), pump clicked loudly, but no pump motor sound. Removed pump checked with external battery same loud clicking - Tapped pump with hammer, now started running. Put back in car where it now worked. Drove car back in driveway. Assumed stuck pump from brush or vane wear.
- Ordered new VDO pump from Pelican - Installed in car worked for 2 weeks. Now same problem is back, same symptoms. Pump clicks etc. Removed new pump, does not unstick when tapped (not whacked) and checked with external battery. (no I did not hook it up with wrong polarity) - California car - No rust or or other impurities in tank or fuel lines. Power to pump is 11.5V as mentioned above and connectors are spotless. And, yes the pump intake is submersed in fuel, and the screen is also spotless (just like the old one). - Issue seems to happen after car has sat for at least 2 days - Never came up when actively used. - Possibilities : 1. Bad new pump (has anyone experienced this?) - Unfortunately I threw out the old pump so no backtracking. 2. Debris falling back into pump from fuel line, causing pump to stick. (No sign of stuff from line when disconnecting though, any experience here?) 3. Any other ideas out there? thanks, Peter Last edited by psmidth; 08-06-2016 at 07:07 PM.. |
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08-06-2016, 05:21 PM
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Registered User
Join Date: Aug 2016
Posts: 2
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Fuel Pump
Hi,
I had the Fuel Pump also go on my 2004 325Ci. I think from what you wrote, if you put 12V to the pump & it doesn't run, it's no doubt a bad pump. There's no reason the pump shouldn't run with direct power. It seem strange that you would get a new pump that would be bad, but no run with direct power is a pretty good sign. Hope you already got it fixed! 
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08-14-2016, 03:22 AM
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Administrator
Join Date: Aug 2016
Location: Los Angeles, CA
Posts: 6,087
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Hey Peter...I too hope that you've already got it figured out and fixed, but if it's still giving you trouble; check out these 2 articles from our Technical Articles section on E46 Fuel Pumps (links below). Hopefully this gives you a bit more insight and help! Cheers!
 Fuel Pump Testing - BMW E46 Fuel Pump Testing | BMW 325i (2001-2005), BMW 325Xi (2001-2005), BMW 325Ci (2001-2006), BMW 325ti (2001-2004) | Pelican Technical Article Fuel Pump Replacement - BMW E46 Fuel Pump Replacement | BMW 325i (2001-2005), BMW 325Xi (2001-2005), BMW 325Ci (2001-2006), BMW 325ti (2001-2004) | Pelican Technical Article -Dmitry/Pelican |
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08-18-2016, 03:30 PM
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