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Registered User
Join Date: May 2014
Posts: 23
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1975 911 fuel prime loss
If I let the car set for a couple of weeks the car loses it's prime and wont start. I replaced tank the pump and the fuel Accumulator, what else could it be thanks.
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06-06-2020, 02:06 PM
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I do not think your problem is losing prime as the pump is lower than the fuel level, and I have never heard of a prime problem. I would put a CIS gauge set on your system and troubleshoot from there. Rob
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06-06-2020, 05:17 PM
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Fuel pump running.........
The ‘75 has the FP running with the ignition switch @ ON position. Allow the FP to run several seconds before turning the ignition switch to START.
Tony Last edited by boyt911sc; 06-07-2020 at 06:02 AM.. |
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06-07-2020, 05:40 AM
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Registered
Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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Even without a prime it should start with the cold start valve. Joe
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06-07-2020, 01:08 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,515
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There is a check valve on the fuel pump in the banjo fitting
Inexpensive, change it to hold pressure to the CIS. Bruce |
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06-07-2020, 01:48 PM
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Registered
Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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I believe he replaced the FP which comes with a brand new check valve if I'm not mistaken.
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06-07-2020, 04:08 PM
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1973 Porsche 911S
