914 2.0 fuel problem, Fuel pressure Options

[leuzzifcr]

I have a 1975 porsche 914 2.0 . I have 19lbs of fuel pressure going into the regulator but I do not have any fuel pressure going out . I have already replaced the regulator . the car has been sitting for about 5 years . when I first got it I replaced the spark plugs and it ran . the next morning it would not start . It hasn't run since . ANY HELP IS APPRECIATED

[SLITS]

19 lbs is not enough ... Pump should put out well over 40 when connected to the pressure regulator and dead-headed it should bury the needle on a gauge.

You have one of the following:

1.) Plugged screen in the fuel tank

2.) Pinched supply line

3.) Bad pump

4.) Plugged or kinked pressure line to the engine

5.) Bad fuel filter

The fuel pressure in the system should be near 30 psig running. When the key is shut off, it should hold about 20 psig for a while.

That's my opinion .............

[Cap'n Krusty]

You shouldn't have any measurable pressure after the regulator, as the fuel there is "overflow". You should be reading 29 to 30 PSI before the regulator. Regulators rarely, if ever, fail. Usually, it's the pump failing to make enough pressure and flow. This could be a bad pump, a bad filter, or a clogged screen inside the fuel tank. The latter is common in cars that have been sitting for a long time. The clogged screen is often rust from the inside of the tank. Lotsa things to look at, mostly expensive.

The Cap'n

[leuzzifcr]

You shouldn't have any measurable pressure after the regulator, as the fuel there is "overflow". You should be reading 29 to 30 PSI before the regulator. Regulators rarely, if ever, fail. Usually, it's the pump failing to make enough pressure and flow. This could be a bad pump, a bad filter, or a clogged screen inside the fuel tank. The latter is common in cars that have been sitting for a long time. The clogged screen is often rust from the inside of the tank. Lotsa things to look at, mostly expensive.

The Cap'n

Thanks for all your help . while researching through the forum archives , I found a schematic that showed the proper way of fuel line routing and discovered that someone crossed some of the fuel lines . I corrected the fuel lines and it ran .