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E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 11-13-2013, 08:11 AM
godddy godddy is offline
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Exclamation bmw 318i fuell pump need help

So my fuel pump was going out on my 1985 318i bmw, so I put in a new one. I went to crank it over in order to get it to pump, I did this for about ten minutes, nothing happened. I had my buddy check that it was running when I cranked it over and the pump was turning on. so we disconnected the line to the rail and cranked it to see if fuel was being pumped and nothing. We then detached right behind a small cylinder thing almost looks like a mini fuel filter. this is right behind the pump and inline. we then cranked it out and nothing no gas but you can feel pressure on the tube when it cranks but it isn't very much. There is gas in the tank as well so it cant be that.
Please help its quite urgent thanks.
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  #2  
Old 11-13-2013, 08:39 AM
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hornhospital hornhospital is offline
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Welcome to the fest.

Did you put 12v directly to the pump to test it? Or bypass the fuel pump relay? You need to see if the pump actually runs. If not, take it back. Where did you get the new pump?
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  #3  
Old 11-13-2013, 08:55 AM
godddy godddy is offline
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I got the part from Napa. And I didn't bypass the relay but when the car cranks over you can feel and hear the pump turn on. thanks
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  #4  
Old 11-13-2013, 09:02 AM
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hornhospital hornhospital is offline
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There are TWO pumps; in-tank and external. Which one are you hearing?
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #5  
Old 11-13-2013, 09:09 AM
godddy godddy is offline
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The one I am hearing is the one I just replaced and it is the main external pump.
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  #6  
Old 11-13-2013, 12:15 PM
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hornhospital hornhospital is offline
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Sorry, for some reason I thought you replaced the in-tank pump. If the in-tank pump doesn't work, the external pump won't, either, since it has to have low pressure high volume fuel delivered to it by the in-tank pump.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #7  
Old 11-13-2013, 12:20 PM
godddy godddy is offline
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I checked the in tank one before I removed the old inline one and it worked. I don't understand why it would just stop working in like a 35 minute timeframe. thank you for all your thoughts I greatly appreciate it.
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  #8  
Old 11-13-2013, 10:14 PM
godddy godddy is offline
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So I took out the new pump to put in the old one, to see if the old one fixed the problem. When I took off the new one no fuel came out of the fuel damper. This made me think to check the inside tank like horn hospital asked. what I found was that it seems to not be working so we cranked it over and no fuel came out of the damper so I believe that the in tank pump needs to be replaced as well even though it worked before I took off the old inline pump. Any thoughts or ideas?
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  #9  
Old 11-18-2013, 07:04 AM
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Nick323 Nick323 is offline
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Check the working of the pump by applying a good 12v source to it and check for the pressure it gives.
Then you KNOW
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Old 11-19-2013, 09:29 AM
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downhiller downhiller is offline
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i think you qualify for checking for power to the connector to the intank first, make sure youre getting the power first before replacing the pump. if you have 12v when cranking, then do the intank pump swap. you can do the chevy vega pump to help keep prices down ($200ish for the intank assembly, cant order pump only). i did a write up on in the past. pretty easy
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  #11  
Old 11-19-2013, 03:07 PM
godddy godddy is offline
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I believe its just the intank pump just waiting on the part . We did check and it did have power
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  #12  
Old 01-08-2014, 11:41 PM
godddy godddy is offline
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It was the intank pump but I believe both pumps quit working at around the same time but I'm not really worried it is all installed and runs like a dream again. Thankyou so much for your guys advice.
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