 Fuel Pump Relay, Where is it? |
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| jesiv |
 Oct 18 2022, 03:28 PM
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#1
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Senior Member  Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California  |
So I am bringing my 914 back to life. I want to turn the engine over but I want to disable the fuel pump first. I thought there is a relay or fuse but the fuse panel doesn’t show one and my relay board doesn’t appear to have one (see picture). So where is it?
Thank you for the help!!!   |
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Replies(1 - 8)
| dr914@autoatlanta.com |
Oct 18 2022, 03:35 PM
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#2
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914 Guru Group: Members Posts: 7,858 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
your 1.8 has it hanging on the side of the battery stand
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| jesiv |
Oct 18 2022, 07:27 PM
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#3
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
QUOTE(dr914@autoatlanta.com @ Oct 18 2022, 02:35 PM)  your 1.8 has it hanging on the side of the battery stand Thank you! I’ll check tomorrow. Hopefully turning it over tomorrow. Cheers |
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| jesiv |
Oct 19 2022, 07:51 AM
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#4
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
QUOTE(jesiv @ Oct 18 2022, 06:27 PM) QUOTE(dr914@autoatlanta.com @ Oct 18 2022, 02:35 PM) your 1.8 has it hanging on the side of the battery stand Thank you! I’ll check tomorrow. Hopefully turning it over tomorrow. Cheers So is this the relay?  |
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| ClayPerrine |
Oct 19 2022, 08:01 AM
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#5
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Life's been good to me so far..... Group: Admin Posts: 15,465 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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QUOTE(jesiv @ Oct 19 2022, 08:51 AM) QUOTE(jesiv @ Oct 18 2022, 06:27 PM) QUOTE(dr914@autoatlanta.com @ Oct 18 2022, 02:35 PM) your 1.8 has it hanging on the side of the battery stand Thank you! I’ll check tomorrow. Hopefully turning it over tomorrow. Cheers So is this the relay? Yes. That is referred to as a "double relay". It is the predecessor to the DME relay on the 911 Carrera. It is a two part relay, and powers both the ECU and the fuel pump. The yellow wire connected to the 4 pin connector on the relay board provides a signal when the starter is engaged to turn on the fuel pump, as there is not enough vacuum to open the flap on the air flow meter when cranking. Once the engine is running, the contacts in the air flow meter are connected, so the pump stays running. Be careful if you buy a replacement. There are ones that look the same, but the pinout is slightly different and the fuel pump won't run. Hope that helps. Clay |
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| dr914@autoatlanta.com |
Oct 19 2022, 08:57 AM
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#6
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914 Guru Group: Members Posts: 7,858 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
Clay the wrong ones end in 121 rather than 120 (bosch number)
QUOTE(ClayPerrine @ Oct 19 2022, 07:01 AM) QUOTE(jesiv @ Oct 19 2022, 08:51 AM) QUOTE(jesiv @ Oct 18 2022, 06:27 PM) QUOTE(dr914@autoatlanta.com @ Oct 18 2022, 02:35 PM) your 1.8 has it hanging on the side of the battery stand Thank you! I’ll check tomorrow. Hopefully turning it over tomorrow. Cheers So is this the relay? Yes. That is referred to as a "double relay". It is the predecessor to the DME relay on the 911 Carrera. It is a two part relay, and powers both the ECU and the fuel pump. The yellow wire connected to the 4 pin connector on the relay board provides a signal when the starter is engaged to turn on the fuel pump, as there is not enough vacuum to open the flap on the air flow meter when cranking. Once the engine is running, the contacts in the air flow meter are connected, so the pump stays running. Be careful if you buy a replacement. There are ones that look the same, but the pinout is slightly different and the fuel pump won't run. Hope that helps. Clay |
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| jesiv |
Oct 19 2022, 04:56 PM
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#7
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
Thank y’all for the information. Greatly appreciated! I’ll turn 75 over tomorrow!
Cheers James |
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| jesiv |
Oct 19 2022, 05:15 PM
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#8
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
Thank y’all for the information. Greatly appreciated! I’ll turn 75 over tomorrow!
Cheers James |
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| jesiv |
Oct 20 2022, 04:03 PM
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#9
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Senior Member Group: Members Posts: 552 Joined: 5-August 07 From: Pensacola/Milton, Florida Member No.: 7,975 Region Association: Northern California |
ENGINE TURNED OVER NICELY!!’
So the fuel pump didn’t run.? Thank y’all for the information. |
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