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777
I have 1981 Porsche 928 with a fuel pick up problem previous owner let car sit for a couple of years
he said he had the fuel pump replaced their is an old fuel pump and filter in the car so i think it was changed like he said He said he drove it and parked it again because it didn't run right I used starting fluid and car started but would not run on its own I cleaned out the old gas and put in fresh gas I then used a little gas to keep it running if you take it away it dies it will start and die with out the gas I do not know much anything about porsche I know i need some help thank you
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Rick:

I had a 79 928, the engines are bullet proff and will last forever. They had cold start injector problems though. They have one injector that is in the intake maniford for cold start only. They go bad all the time. To see if its working pull it out of the housing and have it shoot fuel into a glass when cold. it should spray like a windex bottle. Many dealers will give you a classic car discount on parts just ask. usually 50% off. They are a beautiful car to drive.

Rick:

I was just thinking, you have 2 fuel pumps, one prepump in the fuel tank that goes bad all the time and the other one is on the firewall by the drivers side. that has a filter that plugs in the tank fuel pump goes bad. I could go on for hours about porsche's I've owned probably 20 of them

777:

thank you for your time and fast response I have never worked on a porsche and bought the is for a project i just need to know witch injector if you know I have a question i don't notice if the fuel pump is coming on?

777:

t hank you very much what do you think the chances are of a bad relay to the pump?

Rick:

fuel flow is easy to see.; Pull of the gas line coming into the injector rail and see if it pumps fuel into a glass. there wont be a lot of pressure maybe a 1/2 cup a minute. The fuel pump relay turns on to charge the system when starting and then turns the fuel pump off, when the engine starts the relay turns the fuel pump on. The tank fuel pump is on all the time. I think.

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