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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 03-26-2005, 05:30 PM   #1 (permalink)
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need help.....i needed to replace fuel lines around the fuel pump so i pulled the pump off the car, replaced some hoses and put everything back together and now it will not crank back up....when i pulled the pump and filter i emptied the fuel out of both.....will putting a dry pump back on the car make it not want to crank back up? somebody help
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Old 03-27-2005, 12:17 AM   #2 (permalink)
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hey, there are several things that could have gone wrong with the installation of the pump... is your engine cranking at all??? After you crank it, go outside the car, and sit down by the frame... do you hear the pump? If it cranks with out starting, double check that you hooked up the pump facing the right way for flow, and also that it is hooked up right, as far as power, and ground. Let me know what you find...
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Old 03-27-2005, 03:44 PM   #3 (permalink)
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yeah tha car turnes over but wont catch....i thought that when i turn the key to the on position the pump should come on....i do hear it when i turn the key off from trying to crank it but if i tap on the filter it seems like it is emptie when it should be full of fuel....it makes me think that the pump is either pumping the wrong way because i might have the positive and negative wires on the wrong leads on the pump...cant mess with it because of bad weather though
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Old 03-28-2005, 06:59 PM   #4 (permalink)
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Quote:
Originally posted by 1987eta@Mar 27 2005, 02:44 PM
yeah tha car turnes over but wont catch....i thought that when i turn the key to the on position the pump should come on....i do hear it when i turn the key off from trying to crank it but if i tap on the filter it seems like it is emptie when it should be full of fuel....it makes me think that the pump is either pumping the wrong way because i might have the positive and negative wires on the wrong leads on the pump...cant mess with it because of bad weather though
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you probably have the hoses on the wrong way.
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Old 03-28-2005, 10:19 PM   #5 (permalink)
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yeah, you could have the pump lines swapped, hypothetically, but I dont know how you would do that.. I think that you could have the pump turned around. When you took off the old one, did you make note of how it was in there and everything? Did you use the factory bracets to mount up the new one? B/C if it is swapped, you would be trying to suck fuel from the motor and put it in the gas tank, hence the fuel filter would seem empty like you described.
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