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j3studio Fuel Pump Issue Way Out On The Road
Elite Guru
Western Philadelphia Burbs
4247 Posts
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[1985/A4/very stock]

[1000 miles out/no manuals on board/very few tools on board]

The fuel pump is not priming when the key is in the on position - this had been working fine. Now, there's no sound.

Thus, engine start takes far longer and sometimes takes more than one try. Engine runs as normal from that point on, however.

Any ideas? Problem is present in cold or hot start condition.
Posted on: 2008/7/17 21:58
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Grace, 2003 50th Anniversary Convertible
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Woodstock Re: Fuel Pump Issue Way Out On The Road
Senior Guru
Bremen/Germany
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could be the fuel pump relay
Posted on: 2008/7/17 22:15
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CentralCoaster Re: Fuel Pump Issue Way Out On The Road
Senior Guru
San Diego, CA
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Quote:

Woodstock wrote:
could be the fuel pump relay


Posted on: 2008/7/17 22:23
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1985 Z51, ZF6
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bogus Re: Fuel Pump Issue Way Out On The Road
Grand Imperial Pooh-Bah
San Pedro, CA
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Yup. It is.

What is getting it started is the fuel pump switch... it kicks things off dependant on 4 PSI of oil pressure.
Posted on: 2008/7/17 22:39
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NC Kid Re: Fuel Pump Issue Way Out On The Road
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North Carolina
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I know this doesn't help anyone but when I changed my relay, it has this greasy gunk all over it and on the connectors.
Posted on: 2008/7/17 23:49
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j3studio Re: Fuel Pump Issue Way Out On The Road
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Western Philadelphia Burbs
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Okay folks, where and what is the fuel pump relay? Remember, I'm without my Helms...
Posted on: 2008/7/18 0:14
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Woodstock Re: Fuel Pump Issue Way Out On The Road
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Bremen/Germany
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It's the black boxes right next to the brake booster
Posted on: 2008/7/18 0:35
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j3studio Re: Fuel Pump Issue Way Out On The Road
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Western Philadelphia Burbs
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Axel,

Thanks! Can you give me an idea of where that picture is located on the chassis?

[Edit]

Never mind, I just read your caption...
Posted on: 2008/7/18 0:50
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Woodstock Re: Fuel Pump Issue Way Out On The Road
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Bremen/Germany
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Against the firewall drivers side, next to the black drum which is the brake booster and on the other side of the relay is the windshield wiper motor.
Posted on: 2008/7/18 0:54
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j3studio Re: Fuel Pump Issue Way Out On The Road
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Western Philadelphia Burbs
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Quote:
Woodstock wrote:

Against the firewall drivers side, next to the black drum which is the brake booster and on the other side of the relay is the windshield wiper motor.


Wow - thank you very much!
Posted on: 2008/7/18 1:35
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j3studio Re: Fuel Pump Issue Way Out On The Road
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Western Philadelphia Burbs
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So I and a few other guys on the road tour went out and took a look - we jiggled the connector a bit. Turned the ignition to on and I can hear the fuel system charge...

...walk away quietly.

Thanks to all for your help - I think I'll be getting a replacement relay anyway.
Posted on: 2008/7/18 2:13
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bogus Re: Fuel Pump Issue Way Out On The Road
Grand Imperial Pooh-Bah
San Pedro, CA
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check the harness end... I would not be surprised if it's all chewed up. I know it was bad news on bastet44's 87.
Posted on: 2008/7/18 2:22
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CentralCoaster Re: Fuel Pump Issue Way Out On The Road
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San Diego, CA
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Yes, definitely check for shrunken insulation when you get home. A short there can take out the ECM power.
Posted on: 2008/7/18 2:27
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Livin_the_dream Re: Fuel Pump Issue Way Out On The Road
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robesonia , pa
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Good to hear! So when you gonna post up some pics of the tour?
Posted on: 2008/7/18 3:24
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CentralCoaster Re: Fuel Pump Issue Way Out On The Road
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San Diego, CA
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17 minute response time....

Good job gurus!
Posted on: 2008/7/18 4:14
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TommyT-Bone Re: Fuel Pump Issue Way Out On The Road
Chair-man of the bored
Homestead USA
33760 Posts
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2007/12/10 0:00



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Quote:

CentralCoaster wrote:
17 minute response time....

Good job gurus!


That's better than many Emergency Response Teams. Kudos.
Posted on: 2008/7/18 11:02
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