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boxer74
Samba Member
Joined: July 03, 2011
Posts: 710
Location: Ontario, Canada
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 Posted: Thu Mar 31, 2022 9:38 am Post subject: Fuel Pump replacement problem |
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Hi all, my van died on me last week and I suspected it was the fuel pump. It has been noisy for a while. I had a new Bosch pump on hand so today swapped it in. Now the van won't start. I pulled the bleed screw at the fuel line t-fitting in the engine bay and jumpered the pump to run at the relay and there is no fuel getting to the engine. I can hear the pump running and it comes on twice when the key is first turned, so I think the pump is okay. My thought is that the pump is not priming because the van is parked on a slight hill with the front facing downhill. Does this make sense? Any other ideas?
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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17158
Location: Retired South Florida
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| Posted: Thu Mar 31, 2022 10:10 am Post subject: Re: Fuel Pump replacement problem |
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Did you accidentally reverse the wires on the pump when you installed it?
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boxer74
Samba Member
Joined: July 03, 2011
Posts: 710
Location: Ontario, Canada
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| Posted: Thu Mar 31, 2022 10:12 am Post subject: Re: Fuel Pump replacement problem |
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| MarkWard wrote: |
| Did you accidentally reverse the wires on the pump when you installed it? |
I don't think so. Mine had a blue + smaller wire and larger black - wire. Would the pump even come on with them reversed cuz I hear it buzzing.
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VicVan
Samba Member
Joined: July 01, 2015
Posts: 1845
Location: Vancouver Island, BC
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| Posted: Thu Mar 31, 2022 10:32 am Post subject: Re: Fuel Pump replacement problem |
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| aberg83 wrote: |
. Would the pump even come on with them reversed cuz I hear it buzzing. |
Yes it would. It's just an electric motor. If you reverse the wires, you reverse the rotation, wchich would cause the symptoms you describe.
Just give it a shot!
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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17158
Location: Retired South Florida
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| Posted: Thu Mar 31, 2022 11:15 am Post subject: Re: Fuel Pump replacement problem |
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If the tank is clogged, that may have been the problem all along. The new pump is starving for fuel if it's wired correctly. The pump should have a + and - on the terminal area.
You could get a length of hose for the pump pickup and set it in a gas can and see if the pump primes and then the engine starts. If that works, you've isolated the tank as the problem.
edit: plus I recall a thread where an experienced member went through a similar situation to find the tank was empty.
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boxer74
Samba Member
Joined: July 03, 2011
Posts: 710
Location: Ontario, Canada
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| Posted: Thu Mar 31, 2022 11:23 am Post subject: Re: Fuel Pump replacement problem |
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| MarkWard wrote: |
| Did you accidentally reverse the wires on the pump when you installed it? |
Bingo! That was the problem. I feel like an idiot. Thanks guys.
Swapped wires and it runs like a dream. Much quieter now too.
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