 Fuel pressure, losing fuel pressure |
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| ice cold |
 Jul 4 2014, 07:41 AM
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#1
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Member  Group: Members Posts: 90 Joined: 12-February 14 From: West Palm Beach Florida Member No.: 16,993 Region Association: South East States  |
My recently acquired 914 seems to lose fuel pressure after running for a while. Here is what I know for sure. I have pulled out the screen in the tank and have installed a carter fuel pump and all new lines including through the tunnel and under the tank. The car is a 76 with 44IDF carbs and a holley fuel pressure regulator with a guage installed after the regulator. When cold the fuel pressure pumps right up to 3-3 1/2 psi. Letting the car run in the garage for 20-30 minutes the pressure guage drops to 0. I have installed 2 different pump and the problem persists. Any ideas.
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| jmill |
Jul 4 2014, 09:23 AM
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#2
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
Venting problems like Motorvated said are the most common. Did you try running it with the gas cap very loose or off. Once you ruled that out you likely have a supply problem like a kinked or collapsed line. Potentially even some gunk in tank intermittently clogging tank outlet.
On a side note the Weber can handle 4 psi. Much more than that and you run the risk of lifting the needle off the seat. Bad things happen then. If all else fails, you can eliminate your regulator for a short test to see if that's your problem. |
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Posts in this topic
ice cold Fuel pressure Jul 4 2014, 07:41 AM
motorvated Is the tank vent letting air in as the fuel is bei... Jul 4 2014, 07:57 AM ice cold Tank does have the expansion tank in place and blo... Jul 4 2014, 08:16 AM jmill Is the pump under the tank or in the stock locatio... Jul 4 2014, 08:34 AM jmill
The car is a 76 with 44IDF carbs and a holley fue... Jul 4 2014, 08:36 AM ice cold The fuel pump is supposed to be internally regulat... Jul 4 2014, 08:42 AM
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