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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 08-03-2009, 09:05 PM   #1 (permalink)
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82 320i Fuel Pump Problem

I have an 82 320i. The fuel pump does not function. I found no voltage at the pump with the key on. Replaced the fp relay. Still nothing. A mechanic told me that the distributor sends a signal which kicks on the fuel pump and that the distributor needed replacement. Can anyone verify this? Also, can I test the fuel pump with a 12v feed?
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Old 08-03-2009, 09:33 PM   #2 (permalink)
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You should be able to test your pump with direct power, and I have never heard of such a distributor "signal".
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Old 08-04-2009, 12:13 PM   #3 (permalink)
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fuel pump

It appears that the fp power lead is coming directly off of the relay. Do you know what kicks the relay on. Is there anything beyond a standard ignition source?
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Old 08-06-2009, 08:09 PM   #4 (permalink)
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So I decided to check the wires going to the fuel pump. I disconnected both wires from the fuel pump and ran a wire to the front of the car from one of the fuel pump wires. Then I yanked the fp relay out and grabbed a volt meter and began checking for closed circuits. After attaching the long wire to both fuel pump wires, I found that all of the terminals in the relay slot were closed in respect to the fuel pump wire(either one). Further more, I decided to touch the vm to ground and suprise, it was closed as well. It seems I may have a short. Am I missing something.
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Old 08-06-2009, 09:47 PM   #5 (permalink)
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I'm not sure what your source at the front of the car is. Are you going straight to the battery?
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Old 08-15-2009, 10:41 PM   #6 (permalink)
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So I decided to check the wires going to the fuel pump. I disconnected both wires from the fuel pump and ran a wire to the front of the car from one of the fuel pump wires. Then I yanked the fp relay out and grabbed a volt meter and began checking for closed circuits. After attaching the long wire to both fuel pump wires, I found that all of the terminals in the relay slot were closed in respect to the fuel pump wire(either one). Further more, I decided to touch the vm to ground and suprise, it was closed as well. It seems I may have a short. Am I missing something.
fuel pump fuses?
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