 Fuel pump fuse, Fues keeps blowing. |
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| lexus914 |
 Jun 21 2021, 08:05 PM
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#1
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Newbie  Group: Members Posts: 4 Joined: 9-May 15 From: fishers,in. Member No.: 18,716 Region Association: MidAtlantic Region  |
I have ‘73 914 2L with factory FI. My fuel pump fuse all of a sudden started to blow.
I checked my AAR and it functions as it should. I checked the lead and is does not appear to be compromised . I checked the resistance and it is reading 13. What else do I need to check? |
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Replies(1 - 4)
| porschetub |
Jun 22 2021, 03:24 PM
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#2
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Advanced Member Group: Members Posts: 4,704 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(lexus914 @ Jun 22 2021, 02:05 PM)  I have ‘73 914 2L with factory FI. My fuel pump fuse all of a sudden started to blow. I checked my AAR and it functions as it should. I checked the lead and is does not appear to be compromised . I checked the resistance and it is reading 13. What else do I need to check? Best solution is to disconnect the cars wiring to the pump and run independant supply to battery and test that way then you know the pump is ok. Have you tried another relay for a proven working one from elsewhere on the car ?,removing a headlight one is simply,good luck. |
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| bdstone914 |
Jun 22 2021, 06:41 PM
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#3
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bdstone914 Group: Members Posts: 4,536 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(lexus914 @ Jun 21 2021, 07:05 PM) I have ‘73 914 2L with factory FI. My fuel pump fuse all of a sudden started to blow. I checked my AAR and it functions as it should. I checked the lead and is does not appear to be compromised . I checked the resistance and it is reading 13. What else do I need to check? If you have a battery charger run the pump off of it and see how much current it pulls. I think it should be around 5 amps. If it is ok check for shorts to ground. Swap the relay with a headlight relay. Make sure all connections are corrosion free. |
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| tvdinnerbythepool |
Jun 23 2021, 06:25 AM
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#4
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Member Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest 
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Kind of a long shot but mine kept blowing because I hooked up my engine blower motor up backwards. Apparently it did matter the plus and the minus. They use the same fuse. I pulled up on the heater lever in the car and the engine quit!
Just spit balling. Hope you get it solved (IMG:style_emoticons/default/beerchug.gif) |
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| Shivers |
Jun 23 2021, 07:34 AM
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#5
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Senior Member Group: Members Posts: 2,423 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
Resistance should be around 1.5-8 to maybe 4.0 eprox.(old one). There will be variations but 13. is probably close to cooked.
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